My 18 Month Old Is Crying Like Crazy. She Was

My 18 month old is crying like crazy. She was watching some TV next to me and suddenly started crying, I thought she was just sleepy. She would not stop crying and she didn't even wanted me to touch her. She felt asleep on her belly (which she never does). 30 minutes later she woke up again crying and now she was farting and I touched her stomach and I can feel it growling. She just fell asleep again. Before all this he had gone and had a vaul movements that were loose. What can I give her to comfort her?