Had thigh pain for weeks that suddenly stopped while stretching/massaging, now my heel is vibrating like a phone. could it be a blood clot? no pain.

Probably not: See your doctor soon if you think you have a blood clot. Chances are high you don't, because they often are medical emergencies that need to be treated as soon as possible. Most do not last three weeks without intense pain, swelling (ie, DVT) or some form of other acute symptoms (can't see, speak, breathe) that would make a person go to the ER immediately.Clots don't usually cause heel vibration.

Not likely: Was this pain in the back or front of thigh?Detail is impt.If in front, could be totally unrelated.If in back, could be related to sciatic nerve.Sciatic nerve or one of it's branches can be trapped by muscle spasm or vertebral dysf.Sudden release via stretching may have let go the pinching, but the nerve to the heel is a branch of the nerve which may still be irritated.Eval by dr is still advised.