Random Drug Test. Any nurses out there?

Today I took one oxycodone for my back. I have a random drug test in a few days that my coworkers have told me they'be heard is being administered. I have a really good job and can't risk failing the test. So I was wondering if anyone could tell me how long the oxycodone can stay in your urine and blood? Thanks in advance!

Also, they are not prescribed to me and this was a one time use.