Every night I prop myself up with various pillows and cushions so that I fall asleep on my left hand side, partly becasue I know that is the "optimum" position for sleeping and partly becasue its comfortable! I put a cushion behind my back, one between my knees and a small one under my bump. Sometimes I seem to stay in that position all night, but increasingly, I wake up and I have turned and been sleeping on my back (which is my natural, non-pregnant sleeping position). it doesn't seem too uncomfortable when I wake, but, once awake, I instinctively turn onto my side, which seems a bit more comfy.
Am I accidentally causing damage by sleeping on my back? I don't mind if it gives me back ache (seems not to have done yet), but does it cut off the blood supply to the baby or something? I don't know what to do as I am doing it in my sleep Really worrried that its harming the baby somehow....