Now my shoulder is ok but the trainer is still making me wear the brace to make sure it doesn't pop out
Minnesota,
There are a couple of absolutes for you to deal with:
-If your shoulder were OK, you wouldn't be wearing a brace.
-If the shoulder dislocation was not diagnosed by a doctor, then it didn't happen and you are within your rights to not report it.
-Any later claim of ignorance, particularly after this discussion, would be disingenuous, prevarication, dissembling, dissimulation...you pick the word.
-If the dislocation did happen, diagnosed or not, there is a greater likelihood of it happening again. The likelihood increases with each incident. This is the exact progression with my shoulder starting more than 40 years ago. This is why, untreated, it is a disqualifier. That is also why the trainer has you in a brace.
-Until you are properly diagnosed and treated, you will not go one day without thinking about it. You will not do any physical activity without holding back ever so slightly or a lot. My first was at 17, jacking around on a now illegal ride at the State Fair. My second was at 19, wrestling with my roommate. My third, at 21, was waterskiing. I was not thinking about it when it happened. The first two times, the shoulder was reduced at the hospital. The third time, it popped back in. I had the surgery at 22.
-Nowadays, the surgery is so successful and minimally invasive, that the injury can be waiverable. I had the good fortune of having surgery just when they started repairs without using pins. Thirty-seven years later I have total mobility, total strength, and most important, total confidence in the shoulder.
-If you continue on the non-treatment path you should devote your life to properly rehabbing the shoulder. The trainer, unless he/she is a physician or physical therapist, is unqualified to give you a proper regimen. You can't go to a physical therapist without a diagnosis, so you'll have to research it on your own. As much as you strengthen the muscles around the shoulder, the "damage" has been done and the greater likelihood of recurrence still exists.
-It would look really funny if you showed up for your first PT wearing a shoulder brace.
I wish you the best of luck!