(32 weeks) Idk what's wrong w/ my leg. This is going to be the 3rd time (in 2 months) I pull, tear, sprain, or w.e.  the muscle in my knee. Basically I can't walk without that muscle working. Never had a problem with my leg until I got pregnant...and its depressing me to the point where I just don't wanna do anything period. I went to the doctor, took X-rays, my bones are fine, according to them. So then what's causing this!!!!!!?