Jeremy,
I myself am currently on day 5+ (started withdrawal late Friday afternoon) and am now past the worst. It truly is the most difficult thing I've ever done. I first got on this forum back in June stating how I wanted off oxys too. Like you & many others I failed all self-imposed pseudo "tapers" and ended up just doing more.
A common refrain is "I won't sugar-coat it" and so I'm warning you that the next step may be vomiting. For me it started 3pm Sunday & the last time was last night. As of now my chills have been subsiding, so just find a way to get through the next two days and it will get much better!
Just the thought of no longer draining my much-dwindled bank account and not being a slave to these pills any longer is worth the pain....no matter how bad it gets and feels...everytime you feel especially bad, just focus on your body healing from needing it!
Good luck to you. The worst WILL be over soon!