Welcome to SR peep!
I was taking Vicoden for TMJ for a few years and became dependant on them so I can relate! After awhile they seemed to loose their pain killing effect and I needed more and more which resulted in me going from an 8-pill a day habit to a 20-25-pill a day habit in the course of one year.
There is no need to be embarrassed about your situation because it happens to ALOT of people and your DR will know what to do to help you wean off safely if you decide to confide in him/her.
Instead of going the Sub. or Meth. route (which means you will have to eventually wean off that too so why prolong the agony?)..I chose a 4-day rehab and was medically detoxed then followed up with lots of rest and TLC upon discharge at home. Meetings are a good way to keep ourselves grounded too!
Whatever you decide, I wish you the best of luck and please keep posting as I'm sure others will be along to help you out too!
Take care,
Jane