I try using a pillow to raise the back of my sore heel but it still doesn't stop the burning pain. i wonder if achilles tendon is involved. walk ok.

Good question: Achilles tendonopathy tends to produce an enlarged, tender tendon (particularly sore when squeezed). Also, small nerve branches supplying the heel can become irritated to cause a burning pain. One question: why are you taking clonazepam? Underlying disorder? See your doctor for exam. Details of the physical should help diagnosis, and this will help treatment.