I am sorry you are struggling. I remember suggesting therapy. Please talk to your doctor. It might help. As about job I don't know if you have a trade/career or it's just a job. If it's just s job, I'd really try to obtain training/education so you have life long career path. You'll feel rewarded perhaps making difference in people's lives one way or the other. Some careers could keep you so busy and preoccupied that you have no time to think of office politics or socializing with colleagues.

Ex husband is ex for a reason. You cannot change him. Don't respond to your exBF. Don't reach out to exes. And do see a therapist. Everything will be ok. We all get tough moments in our lives. Hugs