i just switched over from 20 mg of Oxycodone per day, to Nucynta 100 MG ER, 2 per day (every 12 hours). I took my last Oxycodone at 1:00 pm yesterday, then started the Nucynta at 7:30 pm last night, I wanted to be sure that my oxy was out of my system. I woke up at 3:00 am with horrible symptoms of sweats, chills, irritability, etc. Should I be weaning off of oxy and alternating?