Grade 2 brachioradialis strain hasn't healed for 9 weeks now ( still having pain and cannot resume normal activities) is there anything i can do?

Brachioradialis : Muscle insets above the wrist and crosses the elbow. First I'd want to know how the diagnosis was made. Second rule out other causes of pain in the region and last confirm by exam or imaging that this is in fact the real diagnosis. Grade 2 typically implies a strain without true structural tear. The principles of treating are rest ice compression gentle stretching and time