How much oxycottton does it take to OD?

hey its 2:07 am and around 7 pm i took a 15 mg oxycotton pill at 10:45 i took another oxycotton pill and started drinking. i have had like 6 beers. and around 1 20 i took half of a 15 mg pill...now im afraid to go to sleep. ihave taken oxy like ten or a few more times before.