Source of my pain?

Doing a little poking around...maybe this is my problem?

Gastrocnemius Tendinitis

* Overuse especially by runners, leads to a sprain of the tendon of the medial head of the muscle Picture - Gastrocnemius Trigger Point Map where it attaches to the back of the medial femoral condyle. Muscular sprains may also occur in the body of the medial and lateral heads.

* Pain on palpation is localised to the attachment point on the back of the medial femoral condyle. Referred pain down the leg may occur. Examination reveals pain on resisted knee flexion in the prone position.

* Treatment consists of initial rest, oral analgesics, progressive calf stretches with the knee straight, and trigger point injections.

Source: The pain clinic.