My stomach hurts bad, I don't know what to do?

So I woke up today feeling fine, and for lunch I had spaghetti from Buca De Pepo or yah, and an otter pop later, and like maybe 4 chocolate covered pomegranate pieces. Pretty soon after I ate the spaghetti my stomach started hurting. Not like cramps, but not like I'm going to throw up. It's been hurting all day and I told my mom and she said to take some IB Prophen and go to sleep. I took some medicine andim trying to fall asleep but my stomach hurts I can't fall asleep. At some points my stomach hurts more than other times, and the only time it feels a bit better is when I sit up. Help?