I echo what others have said about impact of pain medication. I am very sensitive to pain meds, at a lot of levels. When they gave me Demerol for my colonoscopy a couple of years ago, it was like a sledgehammer. My breathing gets real slow, and I am in "La-la Land" for a long time. My wife still laughs about taking me through Wendy's after the procedure, because I was starving. She said "Do you know what you want?" I replied "Yes", and sat there. She waited a respectful period of time, then asked "Do you want to tell me?" ;-)

Same thing with my neck dissection, except worse. They had me on morphine that night, and I was apparently hallucinating and very restless, and also had the depressed breathing. They got me off the morphine by the next morning (surgery started at 4:00 PM).

I hope it is just a reaction to pain meds. Prayers coming your way.