I have been vomiting since about 8 this morning its like a yellow mucus type; I have been eating crackers and drinking ginger ale and I'm still vomiting what could it be.

The best thing for vomiting is no food at all, and no carbonated beverage, just lukewarm water or very weak juice. Yellow is sometimes a sign of bile (or it might be greenish), although at this point, it might be yellow from crackers and ginger ale. We can't possibly diagnose what's wrong, but I would consider seeing a doctor or walk in clinic tomorrow because it's Friday. You could have a gallbladder problem. Just a guess, of course! Could be anything, even just a stomach virus.

The bestthing for vomiting is no food at all, and no carbonated beverage, just lukewarm water or very weak juice. Yellow is sometimes a sign of bile (or it might be greenish), although at this point, it might be yellow from crackers and ginger ale. We can't possibly diagnose what's wrong, but I would consider seeing a doctor or walk in clinic tomorrow because it's Friday. You could have a gallbladder problem. Just a guess, of course! Could be anything, even just a stomach virus.

I had my gallbladder removed when I was 15 I'm 19 now and after surgery I know that I had really bad pain around my belly button. And it hurts now I feel like I'm getting worse, I feel dizzy and very weak now. Should I go to the ER or wait till tomorrow?

Given the symptoms your displaying I think the sooner the better.

Agreed.
(Bile by the way is secreted by the liver, but you probably know that.)

Are you sexually active?

Please let us know how your appointment went.

Good luck.