Ouch, Joy, sounds painful! :(
I don't know if I actually have it, but I have very sensitive feet. One thing that has helped me has been to wear elastic bands around my arches. I have very high arches, so that may just be the issue, but they do seem to help the entire bottom of my feet. Some days, though, my feet are too sensitive to wear them.
HOWEVER, I would caution anyone with poor circulation or diabetes, etc., to think twice about wearing them, as they're fairly tight. Maybe check with your doctor.
I found them at Wal-Mart, in the footcare department, in case you're interested in trying anything like that.
Hope your heel is better soon!!!