Same here: 27 weeks and just about now is startingto feel a bit uncomfortable, so I'll guess I'll try my sides from now on. But I had no problem with sleeping on my belly so far
Just about 32 weeks and I still sleep on my stomach. Doctor said as long as its comfortable its okay.
Whenever it's uncomfortable for you. Your body will let you know when it's time to start sleeping a different way.
My doctor told me at 15 weeks to start sleeping on my sides