This has happened a few times right before my period. I get up and it feels like my muscles in my arms and legs are weak. At the same time those limbs feel like they are tingling and I need to shake them out. I don"t know if this is like internal shakes or not.

I get tingling and vibrating and the feeling of bugs crawling on me.... is that how you feel? Mostly my calves.. and I feel weak and ever so tired!!

How old are you if you dont mind my asking??

I am 50. I started getting the worm crawling thing about 6 months ago. I feel it in my feet and calves and almost always when I lay down. It causes cramps in my feet also. This tingling thing feels like you slept on your arms and they are going to sleep. It feels like I need to shake them out. With that my muscles feel weak. Today I did take my vitiamins which included a caltrat which has calcium and some mag. It helped alittle. As I am typing, it feels like my arms are going to give out. My period is due in 2 days.

Well I say it has to be hormonal, I have the same thing.. the crawly feelngs or electrical buzzes.. yea my calves are the worst. However per my FSH test, my doc says I am not in peri (will be 42 soon).. but from what I hear your levels go up and down all the time.. soooo I don't know what to think.
Talk soon!
~L