Should i be upfront with my doctor that i self medicated with pain meds prior to seeking treatment for pain?

I have had chronic headaches since i was nine... I don't want him to treat me differently... Narcotics are the only thing that work (i have tried anything you can name) I am addicted to nothing, I haven't taken pain rx's for a couple of years but i can't live like this anymore, it's seek treatment, or suicide. I've given myself one year to find treatment for my chronic headaches. My wife is going to help dole out my medication if it is prescribed it will be kept in a safe, should we even tell this doctor or will it make him scared i am a liability...