K.M.
It is probably planter faciitis but you should have it checked out to be sure. There are special excercises to do you can find them on line also you need to wear shoes all the time my Doctor told me to wear them unless I was in the shower or asleep. I got a special brace to wear at night, my insurance covered it. Putting ice on it at night helps a lot too. It can last a very long time like a year or better. Mine started in July last year and I am still having problems but only when I don't wear my shoes and do a lot of cooking. I feel for you it is painful.
Kay