I am still vomiting 2 days after drinking alcohol. is this just a bad hangover or something more serious?

Vomiting: It is not the norm. I would seek medical attention at urgent care/ doctor as you have to make sure you can hold down fluids otherwise you dehydrate which also causes vomiting. Also excessive vomiting can damage your esophagus and cause electrolyte abnormalities .You likely need IV fluids because you are dehydrated and need electrolyte replenishment. Seek medical attention today.