Can’t lay on one of my sides?

Alright, I’m a FTM so maybe I’m just being dumb. I’m 27+5 and every time I try to lay on my right side I can’t. It almost feels like I can’t breath and it makes me cough?! Has anyone else experienced this? I’m really only comfortable on my left side, and it has been that way since I was +10 weeks pregnant. 😅