Sternum Pain

C

So i just hit 29 weeks, and my sternum is KILLING ME. It’s not so bad when I’m standing, but if I’m sitting it’s super sensitive to the touch and it feels like a bruise, but there’s nothing there. I’m 4”11 with a really small torso, could it be my uterus just pressing everything up and making me sore?? 😥 any relief suggestions? Calling my dr first thing in the morning but anything til then!?