Finally, after you run, massage the bottom of your heel with ice until it becomes numb. This helps to relieve the pain and inflammation. So does aspirin or ibuprofen. And, of course, let your doctor have a look at your foot, particularly if you don't see at least some improvement in a few weeks. But it may take weeks or months to go away.
Rest is, of course, the great healer.
Instead of running, try swimming or cycling for a while.