Thanks for the good info on Bile Reflux. One thing I don't have is constipation LOL thank God I already have enough problems. Also thanks for the variouse test info.
If you've noticed you're constipated more than usual lately, it could be your bowels are getting filled, and this is making you vomit. They could do a stomach emptying test, where they see how fast food leaves your tummy, and might be it's not moving quickly enough on account of some valve isn't working right. Bile reflux is when instead of going down into the digestive tract, something is blocking it, so it comes up instead, so they could do an ultrasound to see if you've got a blockage in one of your ducts, pancreatic or gallbladder, or even the liver may be the culprit here.
In the meantime, next time your stomach bothers you, try an alka seltzer, it might help with the acid thing. Also, you could ask for liquid forms of your medicines. If you're constipated, add more fiber foods, like salad and whole grains, and extra water to your daily intake.