Chronic daily headache

hello my name is amy, i have always suffered from the odd headache, but last year in october i woke up with a persistent headache that wouldnt go away, my gp sent me for a ct scan which was clear, then the headache went away 4 weeks later and i was headache free for 2 weeks then they came back again a constant throbbing pain in both temples and in the middle of my forehead one night it got so bad that my husband took me to the emergency room, they admited me for four nights i was then discharged and sent for an mri which was also clear my headaches persisted so i went and saw a neurologist in december 2008 he did all this neurological testing and said i was normal and that my headaches were triggered from stress he put me on endep which helped a little but wanted me to wheen off the endep when my headaches stopped. My headaches stopped when i was put on blood pressure medication and endep, i wheened off the endep at the beggining of January i was headache free for two weeks after the neurologist appoinment which was second week of decmber 2008 until 4 days ago which was a total of 10 weeks, i have just got the headaches back four days ago, i rung my neurologist for another appointment and i am going back on march 23rd, i have had enough it is a daily dull head ache all the time i just want to know what triggers it and how i can prevent them,i did forget to take my blood pressure med the other morning i was wondering if that could of triggered another attack.

has anyone had a similar experience to me?

Thanks for listening. :-(