What’s my age again?

Here is a laugh for you…Yesterday at work the topic of Age came up, and one of my coworkers asks me how old I am. I replied with no thought, 22 (I'm actually 23, and have been for at least 5 months now). We continue talking and about two or so minutes later, mid conversation, I say "oh wait, I'm 23 not 22". We all kind of laughed at my stupidity of not knowing my own age, and even five minutes later I'm still thinking to myself, "23? No 22?" You think I would know my own age by now. I think I am losing my mind, I blame the hormones.