Is it a good idea to go to sleep if I think I've overdosed on oxycontin?

Why are you typing? If you think you have od'd on oxycontin, call 911 and get to an emergency room. If you fall asleep, it may be the last thing you ever do. Get help for your drug problem.
NO. If you think you have overdosed get to the er immediately. Respiratory despression can result in death and falling asleep can make this more likely to happen.