So my first period is now over, when will I get my second period?

I got my first period Apr 30th of this year osbivoulsy. :) And curious when I will get my next one? I know when you first start your periods you can be irregular. I've hear you won't get your next one for two to six months but that depends on the girl. It's just that I have a summer camp that I am really looking forward to and my period would make me not enjoy it as much. Also, I'm 11 years old and 8 months and at a healthy weight and height my doctor said! Currently 5'1". So do you have a prediction or experience from yourself? Anything works! Thanks! :)