Is this something anyone else is going through?

Im currently 18 weeks and every time I go to sleep I go to sleep on my right side. I’ve tried the left side but I can’t sleep on my left side to save my life. Anyway lol I go to sleep on my right side and wake up on my back this has been a new thing for the last week. Mind you I have a pregnancy pillow and I’ve never been a back sleeper I’ve always slept on my right side so it’s slightly funny to me because I’ve always hated sleeping on my back but that’s literally how I wake up all the time . Anyone else have this issue? Seriously wonder why all of a sudden it’s happening to me