Leg pain for few weeks d dimer was normal doctor thinks it was a pulled muscle but it's getting worse hurts in back of leg side of calf and in thigh?

Several possibile: causes including sciatic source of pain of which the most common reason at your age would be Disc herniation v referred pain from a knee issue giving both thigh a calf symptoms. A deep vein thrombosis or clot appears to have been ruled out . If pain is shooting down leg from buttocks and worse with a cough or sneeze especially associated with numbness/tingling or weakness may be disc herniation.