Daily headaches for 8 years

Hello everyone. Here is my story, let me know what you think, I'll try to make it brief. I am only a mere 28 years old and I have had headaches for about 8 years. They have gone in cycles (no rhyme or reason) where I had had them EVERY DAY! I have had numerous trips to the ER and MANY other doctors. I have been on all kinds of meds and I have had nerve blocks, phsycial therapy, biofeedback, cervical spine injections, etc. They were so bad this last Dec. (2002), that I was out of work on short term disability. They have actually not been bad at all for the last few months, however.....they are starting again and I'm scared. I am not on any preventative meds and I only take Excedrin for them. However, they are getting worse. Any thoughts? Words of experience? I so do not want to be in a world of pain again! Thanks!