How did you help your husband understand postpartum depression?

Hi, my baby is five months old, I went back to work this week and I’m starting to have pretty severe depression. It is causing problems in my relationship. My husband just can’t understand it, he keeps telling me that I’m looking at the glass half empty and being pessimistic. I don’t know how to make him understand that it’s more than that. He also says that I’m a different person at night. He asked me to explain to him exactly what’s wrong but I have such a hard time putting it into words. I know that PPD is a bit different for everyone. I love my baby so much and feel very connected with her. Did anyone struggling with PPD ever say anything to their husbands that kind of made it click in their brains more.

He knows that ppd is common but when I show any symptoms he is not understanding at all. He is more frustrated than anything