I'm still sleeping on my back off and on. Most nights I feel like I'm on a rotisserie just trying to get comfortable

I asked my OB at my last appt about sleeping on my back and she said as long as I feel fine then its fine. She explained that the only thing that could happen is that you could feel faint if your blood vessels are squashed - nothing is going to happen to bub its still going to get its blood flow just fine. Also she said that a pillow or two behind your head means your not totally flat anyway.

HTH