Also, I've noticed that days when the pain is worse, my stools are yellow.
It is possible that it would have been too small to show up, or it could have been missed. It isn't clear from your original post whether an ultrasound covered your pancreas. I would certainly seek another opinion since you are having pain. It may not be related to your pancreas, but it does sound like you have an issue in your digestive tract.
Gosh, I think you need to go back to your doctor. Yellow stools are often a warning sign that needs to be investigated. This is intermittent though? Having yellow stools can be due to a number of things and yes, pancreatic issues is one of them. https://www.healthline.com/health/digestive-health/yellow-stool. What you'd need to know if they are diagnosing a pancreatic cyst if it is a true cyst or an inflammatory cyst. It looks like though, that you were actually given the all clear? I'm a little confused.
Celiac disease (issues with gluten, gluten allergy) can cause these difficulties as can gallbladder issues. Those are two other things to look into. But I'd head back to your doctor with the info on yellow stools. Do you keep a food diary by chance?
to all following this post, my diagnosis seems to be a combination of Splenic Flexure Syndrome and fructose intolerance. Endoscopy was normal. My doctor told me that I am producing an incredible amount of gas due to this intolerance and gas becomes stuck in the splenic flexure, which is a curve of the intestine next to the spleen, located in the left side of the body. This curve inflates and causes pain. Regarding fructose, I had a test done and I got a value of 60 and normal value is 20. Apparently this is not very very high (some people get 140) but can cause gas. She also told me not to worry if diarrhea/jaundice/significant loss of weight/severe pain is not present. Just wanted to update in case someone is going through this as well and wants to look into this diagnosis as a possibility.
Thank you for all your questions.
Pancreatic cyst or pseudocyst may show up on ultrasound, but this modality can be limited by various factors such as patient body habitus and/or excessive bowel gas; it is not uncommon for portions of the pancreas to be partially obscured and incompletely evaluated. A more sensitive test for pancreatic pathology is MRI/MRCP abdomen with and without contrast.