I have a metallic taste in my mouth for a week. On Thursday, while having sex, my head felt like it was gonna explode from pressure. Saturday the pressure in my head got worse. Went to ER, had a CT and they found nothing but intermittent high BP. Sunday, I dry heaved and it felt like a thunderclap in my head. Paramedics said my bp was 187/104. I m dizzy, nauseous as well. CT was still negative. What s going on?