Blood Clot VS Leg Muscle Pain?

Went to urgent care last night & the DR there said that my leg pain was purely muscle pain.. I am still concerned. I think I am a slight hypochondriac, The pain is behind my left knee on the inside beside the indent in the knee. It started as a pain near my achilles tendon that shot up my leg & than yesterday morning the pain at the top of the leg hurts too. It was pretty bad pain yesterday after the Urgent care I came home and took 4 motrin and it's subsided a great deal this morning so it's not an actual blood clot if the pain goes away right?