Everyone above is spot on. I was worried about this as well. As long as you are comfortable you are completely fine. Baby isn't quite big enough for you too squish yet. But trust me there will be that time when your belly is no longer an option and you will definitely know lol.
my dr said its fine if ur comfortable once it isnt comfortable for u anymore then dont
No. As long as you're comfy you're fine. I'm 24w and huge and I still sleep on mine lol. The dr said you'll know when to stop