I am a 21 year old female, standing 5 ft 6-in. tall and weighing 182 pounds. At approximately 12:00 pm, I took one 10 milligram Oxy, and then at 9:00 pm, I took two more pills. I chewed the two I took at 9, instead of just swallowing. It is now 2:20 am, and I am wondering if I should sleep. I feel extremely tired. Even writing this, I have almost dozed off about 6 times already. I am also VERY itchy. All over my body. I don't think I am having trouble breathing, or anything like that. It is just the itching and extreme drowsiness. I was reading in a few other places, that it is quite possible to fall asleep and never wake up. Should I be concerned?