What Causes Tingling Feeling And Pain In Leg?

I am a 29 year old female, 120 lbs, 5'6''. Last week a few hours after a run (I am just trying to get back into it after a long time away from running) I was standing up and it felt like someone punched me on the side of my left thigh, so that I even looked around to see if anyone was there. Since then my leg has been aching and tingling. Also a few days later my baby, ring and middle fingers on my left hand started getting some pins and needles. I have been stressed out lately because I am back in school and I didn't know if that might have had something to do with it. Otherwise I am healthy except a small prolactinoma for which I take 0.5 mg of Dostinex once a week.