i am having trouble walking, saw a doctor on Tuesday, am on medication for strained muscle, the pain is getting worse, cannot walk without the aid of a crutch. The pain is in my lower left leg. I think it may be a blood clot, have had pain for approx. 2 to 3 weeks. Technician said there are no veins on left side of my leg where the pain is located, I would appreciate your opinion. Thanks.