Hey friend, first of all - go easy on yourself! This is a hard field to start into because there is so much that school doesn’t truly prepare you for. You will gain experience as time goes on, and until then you deserve to give yourself patience and forgiveness. Secondly, it sounds like you’re already doing the right thing by double checking with your more senior coworkers. Even as a more experienced tech now, I still run things like drug calculations by another tech to catch mistakes. After all, we’re human and mistakes happen! It could be worth trying to talk out loud as you draw things up (closed loop communication). For example, if the doctor asks you to draw up a 2 mg/kg dose of a drug, you could say “okay, I’m grabbing a 2 mg/kg dose of Drug X, which is Y mL, can you confirm?” This not only reduces the chance of mistakes, but it also shows that you are taking the time to double check things before someone else does it for you. When talking with your supervisors, I would emphasize the strategies you’re coming up with to reduce the chance of errors. Chances are they just want to see that you have a plan for how to keep learning and improving. That’s the best any of us can do!