Unappreciated

My fiancé doesn’t understand how hard it is to take care of the baby all day everyday alone. I get that he works but being a full time mom is work to. It’s overwhelming and he acts like what I do doesn’t matter. It hurts. I can’t talk to him because he just gets mad and impossible to talk to. I ask him to take her to give me a break and he gets pissed. I’m struggling with baby blues but I can’t talk to him because he doesn’t understand and will just invalidated my feelings. I’m sinking and I don’t know what to do. 😞