I taught for 25 years & finally had to hang it up because of my bipolar. It's extremely difficult to get in front of a class & pretend everything's alright, so I empathize with your situation. I'd often call in sick for two weeks when I was having a particularly bad depressive episode...& went over the number of sick days allowed each year.

I'm sorry your husband isn't supportive. With things going downhill at work it would be helpful if you had some support at home. It's not fair of your husband to take out his frustrations on you. I'm sure he doesn't mean the things he's saying (at least I hope not).

I hope you have better days ahead. Being bipolar, we know that what goes down will eventually have a upturn. It's hard, however, to see that when things look especially dark. Hang in there & consider using sick days rather than taking a full-scale medical leave. I'm sure administration will understand your situation.