Really sick..will I be better by Christmas?

I don't know if I have the stomach flu or if its just a virus. I have a fever (around 102), headache, and I'm throwing up a lot. I can't keep anything down at all. I've tried gatorade, sprite, ginger-ale, tea. I can't eat plain pasta or toast either and I just feel really sick. I don't know what else to do, and I'm wondering if this will last a few days and if I should go see my doctor. Any advice would be great.