You had health problems. Employers may be curious, but they don't really need to know details. There are legal limits to what they can ask. Their immediate concern will be for some way to know that the problems are resolved or under control.

What do you think of the National Career Readiness Certificate? It is a set of three tests which cost something like $15.50 each to take. You may even be able to arrange to take the tests for free. If you do, I suggest waiting to review or re-check your answers until you get to the end of the test to make sure you finish. I spent too much time on the earliest questions in the tests looking for trick questions and didn't finish the last two questions on one of them. Anyway, they give you a rating like silver, gold, or platinum. I don't recall if there was a bronze. The tests are by the company ACT, which does the test by the same name.

And the biggest thing you can have in your favor is people skills. Contact people you used to work with or people you know and see if they can help you. Job tips and references, both personal and professional. Having people who say they like having you around goes a long way to help with getting a job.