Thigh muscle feels heavy

What is happening?? I'm in the car driving home and suddenly my thigh muscles feel very very heavy. You know how your muscles feel after taking a sleeping pill. Kind of heavy. That's how my thigh muscles feel right now, and I also feel lightheaded. My legs also feel a bit heavy.

Forgive me, but I'm gonna go on a mini tirade: I HATE THIS FIBRO!! You know I used to be one of those ignorant people who thought fibro wasn't "that bad". Maybe a bit "exaggerated" How stupid I was!!

-rosie