It’s like I’m walking on egg shells around him..

So I’m 12 weeks pregnant and since getting pregnant have gotten annoyed a lot quicker. I am usually good about not taking it out on my fiancé, but I have occasionally snapped on him. I try really hard to control my crazy emotions, but sometimes it feels like I truly can’t. I have talked to my dr and she said it was normal and that I’m just hormonal and that it’s expected (I’m not having unusually bad mood swings). Well my fiancé is not very understanding of my feelings and really just isn’t very nice to me sometimes. If I ever do snap at him he immediately blows up on me and basically tells me I’m always a bitch and that being pregnant isn’t an excuse. He will yell at me and talk to me in super demeaning tones if I slightly change my voice. It doesn’t even have to be towards him, just in general. It’s just really hard because not only do I feel awful and emotional literally all the time, it’s like I can’t even express how I’m feeling or act slightly different or he will be mean to me. Has anyone dealt with this, specifically during pregnancy? How do you deal with someone who isn’t trying to be patient or understanding?