Ladies, have you had your HPV vaccination yet?

My vaccination is at school tomorrow at 11:20am, recess is at 10:50am to 11:20am, and I'm wondering how much should I eat at most? I usually just eat a couple of snacks at recess. I don't wanna eat too much or too less, just enough so nothing will happen to me after the vaccination. How much did you eat before your vaccination if you already got it? Thanks so much!