Am i really preganant if everytime i lay down on my stomach i feel like there's a rock in my stomach?

I am about 14 weeks pregnant. I can't say that I have felt like there was a rock in my stomach. However pregnancy symptoms can vary. Have you taken a pregnancy test? That would probably be the best way to know. Even if the test is negative if you thing you are having abnormalities with your reproductive or digestive systems perhaps you should go see your doctor to have things checked out and make sure everything is OK.