I'm really sorry that all of this has happened to you. Any one of those things would up-end a life. All of them occurring concurrently would be enough to break many people; especially at a time when simple things like going to the grocery or seeing friends for support is potentially life threatening.
As a first step, I would apply for unemployment benefits and evaluate non-essential expenses. This will provide some context to the draw you might need to make on your cash reserves (and perhaps alleviate some of the anxiety of needing to do so if you find that you can drag out your liquid cash before needing to use the Roth). Personally, I would take a hybrid approach given the current unemployment rate, but I'm not familiar enough with the aerospace industry to gauge the likelihood of finding employment without skill development. If your old health insurance covered this test, would it be worth extending coverage through COBRA to obtain one? Alternatively, job loss is a life event that would allow you to apply for coverage through the ACA marketplace.
Again, I'm sorry that you're going through all of this. Good luck.