I hate this!

I have had migraines for as long as I can remember. In the last about 6 years I have had a headache for everyday and then I get migraines on top of the headaches that can last anywhere from 3days to a week. I have been on alot of the meds they have out (inderill, elivill, topamax, maxalt, imitrex pills and injections, midrin, rellpex, and many more).  At one time they said I had "LOW PREASURE HEADACHES" and did a blood patch 2 different times. The first one lasted 1 week, the second one lasted less than 24 hours. I have no clue what to try next. My curent PCP I just transfered to because my other PCP did not know what to do. The PCP I have now is just about the same. Where is a good place to start?