I seriously doubt that your pain is "ischemic" caused by the occlusion in the femoral artery in your thigh. You pain is very point specific and located in a small area on the posterior distal foot/heel area. Ischemic pain from an occulted artery would present itself as calf/lower leg and possibly generalized foot pain. This is clearly too small an area to be caused by your occlusion. Granted you do not have a pedal pulse but even with that I would say you present with either plantar fasciitis, achilles tendonitis and or retrocalcaneal bursitis all of which can manifest pain with the history you present. I would caution on aggressive stretching. I have seen far to many people aggressively stretch the achilles and plantar fascia and aggravate the condition.