I can sort of relate to what you are talking about. When I started taking methadone, I would always vomit-but felt so much better after I did (weird, I know). Also, I would wake up with a hangover-like headache. When I asked my doc why this was happening, he said that my body was adjusting to the medication. Sure enough, after 2 weeks, the vomiting and headaches went away.
So, maybe your body is trying to adjust to the increased dosage. I have heard that oxycontin is very good for severe pain, but I am surprised that he didn't increase your lortab (same as Vicodin) dosage for breakthrough pain, first. But, I don't know your doctor, and I don't know your pain. We all know that everyone is different when it comes to pain (OMG-we've talked about it enough, lately! LOL).
Anyway, I hope that you find the answers and the pain relief that you need. I've been searching for that relief for years-and I still haven't found it. Sorry, I'm just having a really painful day.
FINALLY dxd on 06/13/08
Vicodin, Neurontin, Ibuprofen for pain-which doesn't help, BTW
Zoloft & methadone (NOT for pain) for sanity-which doesn't help, BTW
Klonopin for anxiety (Guess what? Doesn't help!)
Chantix to try to quit smoking (started 08/20/08)
"I'll take the Chivas instead"