Phlebotomy

I found a great job i love doing prior auths which has regular hours, weekends off and time to study for my masters. So from sept through last week i have done nothing but prior auths. Then all of a sudden there is a new requirement for lpns in order to keep our jobs. We must be competent in phlebotomy, despite not using it whatsoever in our positions. I have not drawn since 2009. My nursing jobs from 09 to 17 had lab techs draw the blood. You dont use it, you lose it . Well we had one day of lab protocols. The 2nd day was drawing ppl. 3rd day is test.i drew 40 ppl. Out of 40 ppl i missed 5. I thought that was not so bad for not having drawn blood for so long. Wrong. It was a Fail. I get a retest. I must draw from 9am to 4 pm tomorrow without missing one stick. Is this doable or is this just a way to get rid of lpns? Maybe they hired too many lpns to do prior auths and need a way to weed us out. I am so stressed. I loved this job, thought it was too good to be true. I was right. Any tips to get a draw every time is appreciated. My job depends on it.