I wish I could steer you away from this potential bad patch of time, but what you have explained has put a lot of stress on you. I am not even sure if you are getting enough sleep.
I hope you can decide what you can do to minimize your stress without quitting or quitting work.
Ok, I read your other post. I get annoyed when employees are treated this way. I'll stop there before I go on a rant.
I hope you can find work somewhere else, but the amount of sick time taken off by an employee is one the first interview questions from management at some places.