my mom thinks because I've been stressed out all day because we moved into a different apartment…

my mom thinks because I've been stressed out all day because we moved into a different apartment today isn't normal, how I'm always negative and is worried about how I'm going to be after the baby is here... I've tried to explain to her multiple times that I'm pregnant. It makes me angry that I'm like this and I feel like I'm going crazy. She's my mom, she's the only one I go to vent 100%. So yes all the shit that is gonna come out of my mouth will be negative. She doesn't think being pregnant has anything to do with it, I told her that she's wrong and doesn't know everything so she then says "then don't fucking talk to me anymore" and hangs up the phone. Then turns off her phone. Idk what to do anymore. She does this almost every month and then the next day she will call me crying about how sorry she is. I can't deal with this emotional roller coaster anymore. I'm balling my eyes out.