I would stop all the PED's and if you must stay on something stay on just Test. Until you can kick the methadone. I'm sure the pain meds are probably wreaking havoc on your liver and kidneys long-term, so I hope you are taking NAC or Liv-52 for kidney/liver support. Research liver cleanse on this forum,
@Vision has a great recipe for liver cleanse. I'm sure he would be happy to share.
I know you are in pain from the accident and all but you should focus on either talking to a doctor to fix the problems best you can and get off the pain medication as best you can, or you will just continue the vicious cycle of pain management with pain meds. Which long-term is no good health wise. Talk to your doctor and see what your options are and decide the best route you can.
I wish you the best of luck with whatever you decide, just my 2 cents take it how you want.
Hope you can find relief and get it all straightened out,
PositiveVibes