Yes. The left side is preferred because there are less internal organs on the left side of the body for baby to squash therefore creating better blood circulation for you and baby. Me, however, it's hard for me to lay on my left for long due to shoulder pain so I tend to lay on my right as long as my son doesn't kick my liver. Once that happens, I have to force myself to stay on my left.
Aw thanks girls now I can sleep better!(:
Yes, its fine. Left side is better whether pregnant or not and can sleep on your until it becomes uncomfortable as like the lady above said it starts to put pressure on your main vein and can cause you to become lightheaded.
Donuts fine to sleep on my left and right side?
You're not supposed to sleep on your back you're supposed to sleep on your side. It compresses the vein or something.