Hi Jules, and welcome!
We all here know a little about the "losing our mind" part, don't feel alone! Maybe you are already beginning to see the real nature of AF...it can calm down for a few days and seem to be getting better and suddenly, when you think the ride is over, you're back on the roller.
coaster. It can be a cruel letdown, too. I certainly faced the same situation in not knowing if I should have the LIS, I thought I was healing and wanted to not have it, but that was after seven months. Some here waited much longer to decide on surgery. And the truth is, it's really up to you, only you can decide when you have had enough. The possibility of healing is there, but it seems to diminish as time goes by.
What other more conservative steps have you taken to try and resolve the fissure? There are many ways to manage and sometimes even heal the fissure, and this forum has information to varying degrees on most everything, so do look around...