So you are currently holding a job? And you are only 19. Both those things make it rather unlikely you will be considered disabled. Keep getting treatment. There is a reasonable hope that, with treatment and support, you will be able to maintain emlployment. If you are able to manage being a college student, the SSA will not see you as disabled.

Whether or not you have money in an IRA has not much to do with weather or not you are disabled. If you were judged disabled by social security, having a lot of money in an IRA could block you from getting SSI.

Don't worry too much about owing the hospital money. 7 years ago, when I owed a hospital money, they told me they could not consider my Roth IRA as an asset.

Definitely apply for Medicaid.