Three months isn’t a lot of time, so I would talk to a lawyer sooner rather than later. Google employment lawyers in your area, or “attorney referral service [your state].” You should be able to get a free consultation.
Some lawyers may be able to tell you right away if they’ll take your case, but it may take a little time. And you may want to get more than one opinion. If you have any documents, round those up and hang onto them.
For me, it would have to be something nice, but not so interesting that I want to stay awake (Ariadne auf Naxos). Or something I’ve heard a million times (The Magic Flute).
Beethoven has always been calming for me, so maybe Fidelio too.
If you’re looking for beautiful music, maybe Tosca or Rusalka.
There are others that I wouldn’t necessarily fall asleep to, like Don Carlo, Pagliacci, Rigoletto, or La Traviata. This is a pretty good list of some of the best known operas.