Green to yellow/pale stool?

This problem started Saturday night. I felt unusually bloated and full after eating a big meal. In a way, I felt plugged up and constipated. I started passing a lot of foul smelling gas and had some dull stomach pain under my belly button and then had a bowel movement. It was formed but mushy. Then I had a few more that night that got mushier and looser and greener. I chalked this up to something I ate. But it continued the next day and today. This morning, Not only was it still green but it changed to a pale yellow almost like a Manila folder color but a litttle more orange. This one was also formed! I've also had a constant headache all weekend and no fever. What could this be?? These bowel movements and gas are triggered when I eat!!! This hasn't happened before.

I wasn't sure if this was the correct forum to post it in but I also have UC. But this doesn't feel like a flare. I'm aware green means rapid transit in colon and pale is problem with liver or gallstones. But could this be just a stomach flu??? Or stomach bug? I usually don't throw up when sick....

It could possibly be from diet. But if you are eating the same things you normally do, it could also be your gallbladder to possible liver issues. If it continues, it's best to consult your doctor.