What kind of mistakes have you made on placement? HELP!!

So I'm in 4th year and I've completed 13 weeks of Clinical Placement so far. Today, I injected a cat with 10x the correct dose of Meloxicam...and I am really struggling. The cat is ok at the moment (being flushed with fluids, and it's a stray cat, not one with an owner), but I am beating myself up badly. The cat could die thanks to my stupidity. I misinterpreted the vet's instructions, and no one checked the dose before I gave it, but I should have known by this stage of my education that it... What kind of mistakes have you made on placement? HELP!!
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums