There is no real way to know how far you may have set back your recovery. Just like there is no real way to know how long anyone's recovery will take in the first place, sans partying. (I've been recovering for more than 21 months now...)

I agree with Mark and Nick... you don't want to have to deal with a two year (or longer) recovery, and I don't think you want to make yourself worse either.

Much luck!