Hiya and welcome
Well - you do seem to have come to the right place!
First of all - if you are feeling tired for no reason etc - do get checked out by your DR first of all - that aside - your temp sensitivity, mood swings, erratic periods - yup - they have been part and parcel of perimenopause for me - I started at 43 - but was on BCP before that so that could have masked onset of change
Hormones have a massive influence on mood - I started crying like a baby at anything - commercials - stuff in the papers - I didnt need much of an excuse - I get days like it every now and then
My cycles have been way different to yours - I just stopped and then went on HRT and started again - then stopped HRT - fizzled out - then just started again after 6 months of nuffin

but then we are all so peculiar arent we!!!
Tons to read on this site - form women of all ages - I posted to someone of 23 last night who has symptoms
Enjoy and do not worry - you have found a bunch of great women here!!
Mele