You poor thing!
Your problem is worse, because it's on the bottom of your foot, but I have a condition similar to arthritis (fused bones) in my right big toe joint that can become so painful, it keeps me awake at night.
I have found that the right pair of shoes can make a very significant difference, both in how I feel when I run and generally. I have done especially well with two of the plusher cushioning models - Mizuno Wave Rider and Saucony Grid Triumph - combined, when the weather warrants it, with Thorlo socks.
Hope this helps, and good luck to you.