? Testing and Unit amount

Hello everyone - Mr. Kitty has been so good with all of my pokes today. I just took my PMPS and he’s at 331. I’ve been testing him every few hours - is that called a curve? He was recently diagnosed and the vet has him on 3U of Vetsulin 2x/day. I have an appointment next Friday, yes they said it was okay to wait to test his blood and check his dose then. I’m so glad I found this group to help educate myself about my sugar baby. I’m a little concerned to give him the full 3U because it seems so high. I’m so new at this and need some reassurance. Thank you!