Yesterday i threw up so violently where i felt severe pressure in the middle of my forehead and a "pop". no bruising. still have bad headache today?

Hydration: why did you throw up. If it was something you ate, you should start feeling better after vomiting unless it was really a bad food poisoning associated with diarrhea and dehydration then you need IV hydration at the hospital . If violent vomiting happen for no apparent reason then you could have an increase in your intracranial pressure and you need to be seen by a doctor right away.