Headaches all day, every day for several years

I have been living with a headache all day every day since I was in junior high. I'm 25 years old now. This past winter, I was in 2 car accidents. The car accidents made my headaches worse. I tried chiropractic care, acupuncture, and massage therapy. Chiropractic care made my headaches worse. Acupuncture & massage therapy helped, but my headaches never went away. I'm taking propranalol, cyclobenzaprine & tylenol every day to help with the headaches. If my headache is really bad, I'll take meloxicam and excedrin migraine too. I don't take meloxicam alot because it can cause major stomach issues. The thing is..... None of these meds help at all. My entire head and neck and shoulders hurt really bad all day every day. Sometimes my headaches are so bad that I end up throwing up. It's been like this since I was in junior high. About 3 weeks ago, my doctor took an MRI of my head & neck to rule out a brain tumor, an aneurysm & to make sure my neck wasn't broken after my car accidents. Everything came back fine. he also ran some blood tests to rule out my thyroid, hormones, blood sugar and what not. Everything came back fine. Over the years, I've had so many doctors tell me that I am faking it & that my pain isn't real. I'm really starting to believe that my pain is not real and that I'm going to have to live with having a headache all day, every day. I honestly don't know what to do or what to try next.... Or even if I wanna try anything because I'm so sick and tired of doctors telling me that I'm faking it and don't believe me when I tell them that something isn't working. I have tried taking Topomax in the past. I remember the medicine helping somewhat, but it's been so long since I've taken it, that I don't really remember how much it helped. Right now, I'm working very part time at a McDonald's right now and don't have health insurance. So I can't pay for Topomax since it's still pretty expensive. The doctor I'm seeing now is at a free health clinic & there's only so much he can do for me there. I am looking for a full time job with benefits, but with this economy, I'm pretty much screwed. Anyways, that's my story in a nutshell. Any suggestions, tips, or comments will be appreciated.