I've been having spasms in my intestine area along with gas and belching. my stool is also yellow at times. what could be the cause?

Infect/gallbladder: If those symptoms have been going on for more than 7 days you may have a bacterial or parasitic infection. If you have pain on the right under the ribs it may be your gallbladder. Less likely but still possible is an issue related to the foods you are eating. A good history, exam, labs ( including stool testing) and possibly diagnostic test ( like ultrasound) can help find the cause.