Can anyone help me figure out what my head pain is from?

It all started back in June 2007. A week before my sisters wedding...I decided I would go get a spray tan so I would look better in my bridesmaid dress. Im not a fan of small spaces and honestly I panicked when I was in the sprayer. I felt like I couldn't breathe in the spray tan so I began to panic and almost like hyperventilating. It was finally over and a burst the door open to catch my breathe. as soon as I stepped out my head start THROBBING (I mean throbbing so bad I thought my head was going to burst open) on my right side of my head sending shooting pains from my neck up my head to my eye. I instantly started crying and couldn't stop...I went out to the main room of the tanning salon and told them to call my sister and mother. When they came to pick me up I was still crying and sweating profusely. Before this headache I always was told that I got migraines. This was NOT a migraine. The doctors ended up giving me the two shots for pain and nausea and maxalt for future headaches then sent me home. I went home and went straight to my bed...exhausted. Next thing I know I wake up with more excruciating throbbing and my sister rushes in my room to give me some water to take some maxalt. Once again im bawling and the pain is not going away fast. The maxalt was not helping. After a couple days I was feeling a little better and decided to go back to work. I knew I still wasnt feeling up to par so I would just need to take it easy. I was at work for a few hours and decided I needed to go home...I got up and went to my bosses office and told him I needed to leave, when I stood up and walked back to my desk it happened again...on the ride side of my head throbbing, shooting pain, crying. I had a coworker call my mom and sister but they thought an ambulance was needed. They took me to the hospital and did some test CT scan, blood test. It was really a blur to me as to what happened there. They couldn't tell me anything. Ever since, I have always had bad headaches on my right side...neck, behind the eye shooting pains. They come and go but they last around 3 hours at a time. They have never been as bad as the first ones but they are VERY painfull and I dont understand what could be going on.