Upper back/chest pain

I am 33 weeks, I’ve been having a very uncomfortable chest pain that feels like somebody is blowing up a balloon and it’s taking up space in the center of my chest. The area between my shoulder blades has a constant dull ache as well. I am on labetalol for gestational hypertension. This pain is uncomfortable enough to keep me from sleeping, and I can’t seem to find a comfortable position sitting or laying down. Is this normal? Any suggestions? I’m really starting to struggle mentally because I’m constantly so uncomfortable and I don’t know if it’s just baby pushing up into my rib cage or what. Please help 😢😢