I am a 23 year old female, taking zolaire treatment for allergies, and having eating disorder (binge eating). Yesterday, felt weak all of a sudden, almost fainted, with pain and pressure in left arm. High BP 150/100, heart rate 120. went to hospital had 2 electrocardiograms, blood tests (including heart and anemia) all normal. Checked for Pulmonary embolism – all OK. Blood pressure is now more or less back to normal. But heart rate still at 110, I have terrible headache and still feel dizzy and faint. Doctors don’t know the cause. What can it be? and what tests should I do next?