I have smoked marijuana for about 10 years on and off. Two weeks ago I was smoking and I had what I thought was an anxiety attack. My heart rate skyrocketed, my vision blurred, my entire body went pale, and my head felt like it was swelling up. There was a feeling of intense pressure in my brain, more specifically on the left side of my head, and around the temple. I also had the feeling of an immense migraine. I haven't smoked since, but every other day since then, I have been getting migraines. So bad that it is hard to focus. And once it was hard to breath, so I took two deep breaths and my head began to feel really light, dizzy and I began to get tunnel vision. Although that only lasted for a couple of minutes. Ever since this all began my head has not felt 'right' and I sometimes get the intense pressure build up on the left side of my head and around my temple. I don't know what is wrong with me. Any help would be very appreciative.