Imitrex and calves

I no longer take Imitrex as it makes my migraines 100x worse, more frequent; but I was reading following side affects everyone has.... Ive dealt with the queasiness, feeling lethargic and such....

But some of the ones not listed that I had was extreme abdominal and stomach cramping where I was in fetal position (i kid you not), my back felt as if i had a warm heating pad to it (kind of a benefit on cold days!) and from the calves down, I felt as if I were walking around with 25 pound weights on both legs; I felt very weak and could barely move.

Anybody ever experience any of this!? :(