Pretty Upset

I feel like I can’t express my emotions without him getting upset even when it has nothing to do with him. I’m upset for a number of things, I’ve been trying to be as optimistic as I can and I’m having a weak moment now and me being pregnant doesn’t make it any better. I’m sitting silently and he goes “What do you have an attitude for?” & I tell him I don’t have an attitude & he said “Well what are you in a mood for?” & I just simply tell him “Im just frustrated, I don b ’t want to talk about it right now” & my voice is shaky and he’s like “What are you even crying for?’ & he’s trying to push me to say what’s wrong and I repeat myself now he has an attitude. I give him his space when he’s upset and allow him to regroup! I have no clue what has changed with him but I feel trapped in my emotions, if I’m upset usually I’m able to go into the bathroom or a separate room and cry but I couldn’t do that this time. I hide my emotions for a reason but it’s sucks not being able to be vulnerable around your partner. How can you get mad at me for being upset especially when it has nothing to do with you?