Chronic Daily Headache due to accidental spray of perfume in nose ?

[iamhappy2]

About a year ago, I accidentally sprayed perfume in my nose, one full puff went into nose and I immediately felt pain and burning sensation in back of my head. Ever since I started having headaches and it turned into CDH. Had three CAT scans and MRI with MRA but those came unremarkable. Tried all types of Migraine medicines and for last six months I am on Depakote 1000 mg plus Toporal 100mg. Last month Nuerologist also added 25 mg of Pamelor to my daily dose. The perfume incident happend in March'2006. Actually the headache pickedup badly in april'2006. After going through couple of CAT scans and MRI (with MRA) of brain the nuerologist put me Levaquin,Inderal,Indocin,Elavil... Depakote one after another along with Triptans. Finally Depakote with Toporal started working but not that great though. Meanwhile in Dec'2006 I also saw a ENT specialist, he ordered a CAT scan of upper extremity (with neck and nose) found nothing remarkable.

This headache has really changed my life. I am able to function but no relief from headache though. The severity of pain ranges from 4-7 on a scale of 1-10 with 10 being highest.
Headache is moderate but still becomes severe at times. Anyone knows any remedy?, Will appreciate the answers. Thanks.