I have a stumach ache. What can i do to make it stop?!

I went to a restaurant yesterday and ate a little bit of salad and alot of fries. I only ate untill i was satisfied not full. After that i walked around to see if it would help. (It didnt). Then i came home and lyed down and fell asleep. i wake up in the morning and i still have a stomuch ache. I have this full feeling. I dont want to eat breakfast because my stomuch hurts. I tryed to see if i can go #2 and i dont have to. Oh and i also havent ate take out in about 5 or 6 months. And i just did yesterday. I eat very healthy.(Im Vegan) Please Help!! What do i do?