10 weeks an cramping

I have no idea what's going on. It could be gas. I finally got a little bit of my appetite back today so maybe I ate too much? But it hurts. An my belly is making all sorts of weird growling noises as if I'm hungry but I feel sick. I just don't want these cramps they make me nervous and we have the fetal heart tones tomorrow an I just don't want to stress. Anyone else experiencing this?