What symptoms might I get right before my period?

You sound a bit eager, when I was your age I wanted my period so bad. Now I can’t wait til menopause! Periods suck! You ruin clothing if you don’t keep up on it. It has an odor you have to be aware of. Sometimes the pain from the cramps are unbearably painful. I take it you might not feel comfortable asking an adult, you might feel better asking a complete stranger.

Now that you have experienced most of the “symptoms” as you put it, of puberty, you should keep things on you to be prepared for the day it starts. It will start without warning, and every month thereafter. You should always have spare underwear and pads available.