Hello, I've been experiencing nausea for a few weeks, but have ignored it. Over this weekend, more symptoms developed such as; severe headache, dizziness on standing, and chills. Today, along with the previous symptoms, I experienced rapid heartbeat, confusion, spotty vision, and what I believe were auditory/visual hallucinations. I currently take 18mg of methylphenidate ( since August 2015) and birth control. Are these symptoms concerning enough to seek medical attention?