Any plus size mommies having trouble sleeping?

TriciaS
I noticed for the first time last night that I could not sleep on my back. I haven't had issues before and I'm only 7 weeks but last night I literally woke up feeling like I couldn't breathe. I know this isn't normal but has anyone been through this? I really don't want to go through a sleep study as I'm already a high risk momma and don't want to be put through that.