Stillbirth husband blames me

Okay some and my husband went through a bad patch between 2017 and February 2019. We got so bad we didn’t even talk so I thought about leaving. I met another guy who treated me amazing. Told my husband I was leaving him. Then he changed like something clicked in him he wanted me again and we worked through things.

I found out I was pregnant last Christmas and it sadly resulted in a stillbirth and me being very sick.

Tonight my husband decides to tell me i have bad karma and it’s all my fault because I cheated, Bare in mind we were pretty much done. So now Im lay here sobbing. I’ve done nothing but blame myself and now I find out my husband blames me too. How do you live with that ?