i threw up this morning, it was all liquid, yellow liquid...?!

It was probley flem but you should the doctor if it keeps happening. You should rest and drink fluids.

Whatever you ate the day before had already been digested so you were throwing up stomach acid. Unless you had been drinking something that was yellow like Lemon-Lime Gatorade which could account for the yellow color of your vomit. You need to stay hydrated so drink plenty of fluids, things like Gatorade are good because they also contain electrolytes. If you are still feeling ill and nauseous, try drinking some peppermint or ginger tea or you can suck on a peppermint or raw sliced ginger, 1/2 flat ginger ale is also good.

It was just bile or stomach acid. Not a big deal, you just didnt have anything in your stomach to throw up.

Stomach acid or flem..