Ongoing Digestion Problems

Hi.
I have had digestion problems for the the last 2 years.
It started with bouts of bloating, intense lower abdominal pain which would last a couple of weeks.
This would then turn into nausea, dizziness, feeling ill, dry heaving, burping, vomiting clear liquid not food.
Then this would go away and i would feel ok for a few weeks. This pattern has continued ever since.

I have been nauseous and dizzy for the last 4 weeks. I have pain below sternum on right hand side. Occasional vomiting slimey liquid. No abdominal pain this time. Also had intermittent pale orangeish stools and small amounts of blood in stools a few times over the last few years. Colonoscopy was ok, so was endoscopy. I also had low vit B12 which i have had injections for.

My bloods are ok. Im on the high side of Amylase range. 103. One doctor said about pancreas inflamation and another said it was ok? Im on Lansoprazole which hasn’t helped this last bout of nausea.
I have had ultrasound which shows 2 small polyps in gall bladder. Upper GI doctor said most probably IBS as polyps very small. My regular doctor is just blaming it on stress now. Im sure there is more too it.
Sometimes the nausea and dizziness comes on about 1-2 hours after eating.
Could this all be due to 2 small polyps in gallbladder?
Anybody have similar things going on? or answers.

thanks