Sickness In Stomach, Weak Bladder, Vomiting, Severe Headaches. What Can Help?

i felt sick to my stomach . no head ache at all. when i know i am going to be sick i will sit on the toilet and put a trash can in front of me. i have a weak bladder . i sit there waiting and when i felt i was going to vomit i lean over and just belch. this happen twice. the third time was a belch with, it seem like a dry heaves .with that came a instant severe screaming headache. i grab my head and scream and scream. i was yelling make it stop. i do not have magraine headaches . i was taken to ER . now i am told to see a neurologist . and no i have not stop taken any of my meds.to cause a headache either.and i didn t vomit untill i got to the hospital.