Increasing pain

I really need some help, I have had headaches ever since I can remember which is about the age of 2 and I am almost 25 now. The headaches have been almost non-stop and they vary in intensity from standard headaches which I am so used to now I just get on with things to really bad migraines which stop me doing anything.

I have had various different drugs from anti depressents to very strong pain killers but nothing seems to be doing the job. I have had a CAT scan which didnt show anything up (which was a big releaf), I have tried keeping notes of what I do, eat, drink and tried to find some link to them but to no avail and I stil get them.

My headaches can be so bad to stop me from sleeping or wakes me up, at the moment they are preventing me from sleeping and I feel very tired and quite upset by it all.

Its begining to be too much for me, it makes me cry every night with pain I just want to remove it. I am now at a complete loss of what to do but I cannot stand them anymore every day of my life, they are begining to rule and ruin my life. I have to spend more and more time of work sat down in a dark room or just away from all noise.

The drugs I have tried are:
Naproxin, Solpadol, Zomig, Migraleave, Tylenol, Naratriptan, Sumatriptan, Zolmitriptan, Duradrin, Amitriptyline, Sinequan, Propranolol, Verapamil, and Topamax. Maybe more but i've just lost count
Some of these slighty helpped but still getting constant headaches the one which helps the most is the Solpadol but I cannot and should not take it every 4 hours for ever.
I have also tried the no drug method and just tried to not take anything for the headaches for a while but this still didnt work for me.

Is there anything else anyone can suggest before I go insane with these constant and constantly increasing painful headaches please

My headaches are almost constant, I think the last day I can remember that I didnt have a headache at all was about 3 months ago and I was without any headache for about half a day. I do get episodes when they worsen and the really bad pain can last up to about 4 months but when the pain gets worse is very random. Last time I had a big episode was around April where I had migraine for about 2 months constant.

The pain is mainly focused around my forhead and the left hand side of my head. The pain is also present behind my eyes.

When the pain increases I get tunnel vision, flashing dots in my eyes, my depth perseption is all messed up and I am too dizzy to move