I have had 2 right ACL replacements and a shoulder surgery. No ligament or tendon damage in the shoulder but have experience with knee stuff. I was supposed to have another surgery on my right knee at the end of last year to fix a bucket handle tear in my meniscus but didn't get it done. I was told bucket handle tears aren't the types of tears that physical therapy can heal. I tore it riding, and knew right away I tore something. I was worried it was my ACL again, but it felt different than the other two times I tore it. I kept trying to ride, it hurt like hell but I kept pushing through it for about 10 minutes on the track and then called it a day. The next morning my knee was swollen bad and I couldn't straighten my knee all the way. I had lost about 15 degrees of straightening. The limiting of motion was due to the meniscus being jammed in my joint. I had planned the surgery for a month out so the swelling could go away as per doctors orders. 3 weeks went by and the swelling was gone, and my knee started feeling better.
I kept trying to straighten my knee with no luck, I could bend it all the way just fine though. No pain with weight baring or anything. So I started straightening my leg as far as I could, then decided I was going to force my knee straight with my hands. I basically was trying to hyper extend my knee. It hurt like hell, but I got closer to straightening it each day. After about a week of doing that I had full motion back, each time I forced it straight I would feel the meniscus breaking up and tearing a little more. I am assuming I finally tore the piece off that was stuck in my joint because my knee is perfect now and hasn't bothered me since. I called the day before my surgery was scheduled and cancelled it.
I have a very high pain tolerance and I figured I was getting my knee fixed if it didn't work anyways so I just forced my knee to straighten out. I do not recommend doing this with your shoulder lol. But you asked for a story. I didn't get the last surgery done. You know your body, if it feels like it's getting better, then ride it out until it's either all healed up, or you get to the point that you know you need to get it fixed. I would be careful though, the last thing you want to do is mess your shoulder up worse! Good luck.