I would wait til tomorrow and see how you feel and if you are still miserable and are vomiting I would see a doctor as it could be the start of something more serious such as food
poisoning, a reflux disorder, bowel obstruction, gall bladder etc. You can
vomit a
yellow watery substance for many reasons. My mom had a bowel obstruction about 3 years ago and was vomiting a yellow watery substance but I don't remember if she had any burning in her stomach or not.