A nurse here.
I gave myself a flu shot. I didn’t want to go to the CVS and pay $20 for it. We had gallons of it for the patients and I wanted to get one. That day I knew I couldn’t be a drug user (or a diabetic who had to give himself insulin!)
I once tried to draw my own blood. That was a disaster. I should not have closed my eyes when I stuck the needle into my arm. I thought to myself, “Oh shit, I missed!” and I was screaming when I wiggled it around (the front desk staff came in and screamed when she saw what I was doing to myself.)
I wanted to send out some blood for tests (the doctor whom I worked with was out that week and she signed the orders a few days prior to that.) I wouldn’t trust her to draw my blood either because she had not done it for years.
I was working along (as a school nurse) years ago. Although I had a nursing supervisor (my boss) who was down the hall from me, her needle skills were bad (she had not started an IV for ages while I was doing it almost weekly there.)