Five weeks ago , I started having pain behind my knee in soft tissue. A little to medial side. It could very from 0-10 on pain scale. With no movement at 0. Some movements would shoot it to momentary 10 pain. Bumping inner knees together , back step or side step seemed most irritating. At times it ached from mid calf up to back of thigh. Charlie horse cramps over past month nightly. Sometimes q30 min. D-dimer (sp?) negative for clot yesterday. Today pain in calf making walking very difficult.