Oh man, bad roommates are hellish. My last pregnancy I was living with 3 other people through the summer (also in the south) and one of the roommates was European and wouldn’t push the a/c lower than 80F and it caused extreme stress and major tension. I was in a co-op and only had 2 months left before moving out on my own and literally packed my shit up at 6-7 months pregnant to another vacant room two doors down with different roommates. The other roommates would blast the a/c at 67 all day.

There’s very few choices aside from window units or standing fans to try and improve the airflow. I hope you can move out soon for your peace of mind.