Some places would consider that "leaving without notice". Some places you have to actually work out the notice, taking sick leave or vacation time does not
You could call a lawyer and tell him the story and see if you have grounds to sue. In the future, I would keep my business to myself. With "friends" like those, you don't need enemies. Good
Did you work in a hospital? I can empathize a little. Had the same type of thing happen due to closures, but that was years ago. Got another job after a couple of months, never collected...
I'd go with the accounting, become a CPA and start your own business. You can charge $175 for a 1040 for just filling in a few blanks on the computer program, even more for corporate returns,