Had an affirming weekend with my bf, but my mom’s comments ruined it

I finally met up with my long distance boyfriend for the first time this weekend. I'm 19 and still living with my parents. Let's just say we didn't waste any time together, we made out all evening and ended up giving each other some very visible hickeys. My parents left the next day, so we had the place to ourselves until he left. When my parents got back, my mom started asking about babies.. I felt so dysphoric and got reallyy impulsive. I started saying "no" and "gross” and as it wasn’t enough of my mom’s comments my 10y.o. sister joined in and said something about me having a v... I was already upset, so l instantly replied “no” without any thinking. Then my mom said I should take anatomy classes if I don't know that I do. I mean, obviously I do. But I don’t want a reminder?? For context, I wear a prosthetic packer that's usable for play as well. My boyfriend's a bottom and while we didn't have sex, since we didn't have lube (and he's pretty tight) I fingered him a bit, tho we stopped since it was hurting him. I dry humped and it was honestly soo amazing. We grinded our dicks together and he even sucked me off. It was such a gender-affirming experience. He made me feel like a real man and I felt so good about myself. But then my mom had to bring up the possibility of pregnancy. She completely ruined it for me. Maybe I'm overreacting, especially since I didn’t do my T shot for a few days and might be more emotional, but this isn't the first time she's made comments like this. Even after l've told her multiple times that l don't want kids and that I would NEVER have vaginal sex, she still says things like, "It'd be okay if you got pregnant” I don't know why she's so curious about my sex life and I wish she would just stop. I've thought about telling her I wear a packer, but it feels weird to bring up and it'd kind of violate my and my boyfriend's privacy to tell her l'm the one penetrating him. I don't know what to do to get her to stop bringing up this stuff. It's frustrating and makes me so dysphoric. Any advice??