i recently took a drug test and tested positive for percocet which i did take one perc less then 24 hrs before the test but i have a prescription for percocet. but they are sending it to a lab and im nervous because about 50 hrs ago i had about 30mg of oxycottin for my back. so my question is will the lab just test the percocet that i tested positive for or will they test every thing in the urine and be able to tell the difference between the perc and the OC? also do u think i will test positve for OC when they test it in the lab? also i am not an every day user its only the 3rd time ive taken OC in a year. thank you