Your feelings are completely valid, and so are his. It sounds like he's going through something, have you asked any questions to see if he wants to unload? Try not to ask them in a way that you're accusing etc. You'll probably find that if he wants to open up and talk about what he's going through, then you'll both end up talking about your problems. You're a team that has some stuff to pull through but in the midst of baby-dom sometimes we forget to be gentle and set aside time to explore our own feelings
He shouldn't be getting aggressive with you. You've just produced a new life with him. Revaluate if you want to feel like this the rest of your life. He should be mature to vent his thoughts and feelings with a view to a compromise. He's an adult not a child. I'd fear if anyone behaves like this with me the aggression would escalate. It's shocking how many stories I'm reading of men behaving like this.
Just because he’s going through it and is sleep deprived doesn’t make it okay. You are also sleep deprived probably since you’ve been pregnant. He needs to understand that. Don’t let him use work as an excuse, because when a baby comes along, it all changes and you just have to grow a pair and deal with it like all mothers do. You’re not ‘just hormonal’ saying that is so rude because it’s basically saying ‘your feelings aren’t valid’ in other words, which isn’t true. Have a talk with him, why does he think it’s ok to yell at you? Especially when you’re talking about HIS child. Clearly shows he doesn’t care, if you’re raising a concern about his child and he reacts like that I’d be worried. Tell him to do one to be honest because how dare he, irritates me that men think it’s ok to behave like this especially after having a baby, he clearly asked for the child too and took two to make one so tell him to deal with it.
Don’t let anyone ever tell you you’re “just hormonal” your feelings will ALWAYS be valid and having hormones is no excuse for anyone to invalidate how you feel.