My doctor said I am going to get my period this summer and summer ends in September

Okay, so when a doctor says "this summer" they usually mean anytime between June and August. But periods are like, on their own schedule, so it's totally normal for it to happen a bit later. Doctors usually give you a timeframe, not an exact date, because your body kind of does its own thing.

Your body might be taking its sweet time, and that's okay. It's not a race or anything! The important thing is that your body is getting ready, and that's cool.

Keep an eye out for other signs your period is getting closer. Like, usually you start growing boobs first, then you get some vaginal discharge that looks kind of clear or white, and then a few months after that, your period shows up. Everyone is different, but those are pretty common clues.