For about a week now, i can't sleep on my stomach. when i lay on my stomach it hurts me. can this be a sign that i am pregnant?

Without other signs?: I hope other doctors also reply, but till then. This would not seem to be an early sign of pregnancy. After you miss a period - or notice a very drastic change in that, a pregnancy test will have positive results. The size of the fetus in the first weeks, even months would not cause pain from sleeping on it. See a doctor for evaluation. It is much more likely to be from causes other than pregnancy.