I can empathize. A couple years ago, I had chronic tendonitis in my right leg. Ended up going to a podiatrist, & getting prescriptions for an strength anti-inflammatory and PT sessions. The medication really did the trick in terms of relieving my discomfort ... apparently, achilles injuries can take a long time to heal.

Maybe Knott will weigh in w/some suggestions? In the meantime, best wishes to you, Oak.