Healing can be insanely painful. I have begun to think of it like when I exercise and my muscles are really sore the next day. When you exercise, it is my understanding that you are stretching and tearing the muscles and they heal making them stronger. That is what it feels like for me sometimes.
I do things that I have never done before and then I pay a price, like the sore muscles, only in my case it is panic and anxiety. But once I work through the anxiety (and sometimes it can take days) I am a little stronger and it is not quiet so painful the next time I try to do something. And that is where I have been lately. Trying new things that stretch and hurt and trying them again.
Only each time I do I am a little bit stronger.