Hi, I Think I'm Going To Go To Urgent Care

Hi, I think I'm going to go to urgent care tomorrow but I've been having the weirdest symptoms. I'm a 20 y.o. female who has been vomiting regularly the past week or two (4 times in the past week, typically triggered by eating a meal). Then, starting 3 days ago, I've had a really consistent migraine-type headache (horribly severe, not cured by Tylenol). I took a pregnancy test (turned out negative) and don't really have any severe health conditions -- generally excellent fitness and diet. Any ideas for what could be causing this bizarre mix of symptoms? Thanks!