I am not one that progesterone causes bad problems with but it has completely diminished my sex drive, hope that helps.
Kackle you are right in being afraid to add anything else! I have posted before that my doctor does one thing at a time. His reasoning is basically just what you have brought up, the not knowing what is doing you good and what is doing you bad. My routine started with a blood test, physical exam and then a consultation with his office staff (three of them). After the blood work came back they went over my booklet of questions I had answered and my physical exam results. With all of this information they devised a plan. The first was to treat the worst of my issues which was very low P and also during this time they wanted to weed out problems causing very high T. So I started taking P and had an ultra sound to check for PCOS. After two months on JUST P they redid my blood work and mysteriously the T had dropped down so much that my free T was actually low. So instead of tossing me on Metformin or messing with my E they let the P ride out its course of leveling in my body and thank goodness it worked. At this stage they decided that the P was not helping my thyroid levels so we then introduced armour. Now a month or two after that introduction we are going to try T for libido. Somewhere during this they instructed me to randomly double up on my P to see how I felt, this was because they wanted me to get to optimal levels instead of sitting on the lower end of normal. Doubling up the P actually made me very anxious/edgy/nervous feeling so we knew that wasn't going to work for me. Now instead we will slowly increase my dose by 50mg to start out and see how that goes. Honestly besides the loss of libido I am thinking I feel so good compared to six months ago that I want to just leave it all alone....
but I have faith in my staff that they know what they are doing in trying to make me the healthiest I can be so I will keep on with it. The greatest thing is when there is a failure (or I think it is a failure) I call them and they johnny on the spot deal with it. When I told them doubling up P was a horrible experience I then suggested we simply increase what I am taking over time...guess what...they did just exactly what I ask for.
What I am saying is, take it one step at a time so that you aren't frightened in what you are doing and you will then know for sure what is helping you or not. don't be afraid to say "woooooah wait a minute" go slow and don't expect overnight success with anything. This is all a process and though it is frustrating one small improvement is so much better than set backs. You are your biggest advocate!
It all reminds me when I first put my finger on what my problems could be. My regular gp had me on prozac and benzo, my gyno had me on bcp, I was self medicating with everything under the sun I read worked for some here on PS and all of the sudden I felt worse. I stopped everything I was doing at some point because I didn't want to keep declining. There was a moment when I started my BHRT plan when my dentist wanted me to use Chantix to stop smoking, I spoke to my new gyno (who is also involved in my treatment plan now) and her comment was that even though smoking is very bad for me, tossing in one more drug to the combination would set me up for failure....I now live by those words! The way I see it is this is like the AA plan, take it one day/step at a time or else you will surely fail.
To clarify.
Prozac made my panic attacks less frequent but it didn't take away my physical ailments, it caused me to be very tired all the time and I put on about 40 lbs (so yes it did work kind of)
Benzo stopped my panic attacks and at least let me fall asleep at night (I became dependent on my little blue pills and was up to taking a half one a couple of times a day sometimes) again it didn't take away many of the physical symptoms which of course are what caused my panic attacks to start with.
BCP did help me a lot but I had a cancer scare, a hysterectomy because of that and I was a smoker over 35 (should have never been put on it in the first place)
Random vitamin supplements-well I don't think these harm any of us if taken as directed but besides the b-12 and d3 I didn't get much of an improvement out of any of them.
I also tried L-theanine, otc progesterone, melatonin for sleep, cut out caffeine, cut out saccharin and so on and so forth. None of this alone or in combinations ever truly made me feel like me again.
At this very moment, I can't complain about much at all. My heart palps are almost nill, yes I do have them rarely, they are mild and I survive them without thinking I am dying. These generally happen when I believe I would be having a period (don't have them because I don't have a uterus). The numb extremities and tingling portions of my body are completely gone, headaches are gone, anxiety is gone, sleeplessness is gone, being completely exhausted all the time is gone, UTI's and vaginal infections are gone, aches and pains are gone, moodiness and irritability are gone, food cravings are gone, internal shakes along with hot flashes are gone, I am losing weight, have more energy, my skin looks better, my hair is shinier............basically I feel about 90% better. The other ten percent is just looking at myself in the mirror going "oh God I am getting older"!

The remainder of my problems during my adventure where taken away with the hyster, the bloating, excessive bleeding/clotting, cramping, periods coming early or late, back aches, pms all of those lovely things we gals won't miss once we get through this lol.
Okay I think I explained my own circumstances as close as I can remember, hope it helps somebody else. I know that BHRT isn't the answer for everyone and not here to get preached at by someone it didn't work for but I do feel the need to stay around because my story just might help one person and if it helps one person then that is awesome!
Off to shop with my mom today. Everyone have a fantabulous day!
Bethanie