Hi. I cannot offer you any useful advice about specific treatments that might help your AN recovery. Some of the previous replies do seem to offer some suggestions that might be useful, so I will leave that to them. Like another response above, I had surgery last year and have continuing problems, though nothing as severe as what you describe. To have to face all of this at your young age (I am 60) is horrific. When I was in my twenties I suffered a back injury that crippled me for years. I spent most of my free time in doctors' offices and could find nothing to relieve the pain. I did work, because I had no choice, and sat huddled in pain in a cubicle trying to get through the day until I could go home and lie down. I ate fast food in bed and watched TV out of the corner of my eye because it hurt too much to turn my head. So, yes, I get that your pain is horrible
But, it got better. The body will tend to heal itself in time. My back injury never resolved completely, but eventually things got better. One thing I found that made a difference was that I had to connect to and acknowledge how angry I was at the way it was. I am NOT saying anything like its in your head and get over it. That is completely stupid. The pain is real. But it was also true that my anger was blocking my healing by making me continue to hold tightly in my body. It wasn't until after I recognized the anger and started letting go and accepting that things started to get better.
I can't say that any of this would apply to you at all, that is not my place. But maybe there might be something to gain from going inside and looking at your emotional responses to the situation. It certainly couldn't hurt, even if not helpful. Support groups can help with this sort of thing. It took years, but I did get better and today I feel very lucky to have had the life and love I have. Life is a difficult, slow and complex journey, but it is also enormously rewarding.