May sound stupid to you but...

why do I feel beating (like a heartbeat) in my stomach? Im 15 weeks and my doctor said that was unusual but quite common. I just wanted to know if I was alone...

....................

probably just your own heartbeat

I've had it too. With all my pregnancies actually and I'm not sure what it is. Sometimes, it can be hiccups that we mistake for something else and other times it can be a nervous twitch they do...supposedly while the nervous system is developing it can feel like the same way from a twitch of some sort (almost like a seizure in there..lol). That's the only way I know how to explain it to you. But rest assured you are not alone and many women get this. I'm not really sure what it is ^shrugs^

its probably your placenta. Your feeling your pulse going through the placenta.

I felt it alot too

i know that in later pregnancy, that can be the baby "breathing" the amniotic fluidin and out, in and out, but I dont know if that would feel like "beating" maybe its your artery?

i felt it alot too. its your heart beat. i asked my doctor and he said it was fine. it would move my shirt sometimes.

it is your own heartbeat you are feeling and sometimes you can even see it... its because your body is producing and pumping more blood.. thus making your heart work a little over time..