When I'm sitting up then quickly lay down, I hear my stomach and I feel something. Is this my stomach acid bouncing around and hitting the side making the sound and feeling? DO NOT ANSWER SAYING I DONT KNOW OR I WILL REPORT
If you've recently drank a lot of water you could be feeling the water sloshing around. Other than that, you should not feel stomach acid moving in your stomach. If you have not had a large amount of water recently you should see a doctor.