I agree, I sleep however I can sleep. In past pregnancies, it was a choice between sleeping on my back, and lying awake on my side. Not a hard choice for me. And things worked out just fine. The major concern about being on your back is during labor, not so much during pregnancy. As for you stomach, well, I've never found that to be a comfortable position anyway, so I don't know what to tell you. Just get some sleep however you can.