Maybe you should call your p-doc and tell him/her about how you are feeling and the side effects. It can't hurt to just call.
Even if it hasn't been that long, it just may be one of those meds that isn't for you, or it is interfering with other meds and the combo isn't good for you.
Yesterday I took 2 percocet because of the severe pain at once and I am only supposed to take one every 6 hrs as needed so I don't take them everyday, and I felt nausea's, so you never know, it could be the dosage too.
Good Luck, Nikko
Hope you are feeling better soon.