Full contact sparring in kung fu?

I am 14 years old, I was given the option to participate in full contact sparring with the adult class. I am nervous about the sparring. How old where you when you first started full contact sparring, and did you wear any protective gear? Sifu says I will wear headgear, gloves and a mouthguard. I am afraid that something might happen to my braces when I spar. I am allowed to kick and punch to the legs and everywhere on the body except groin. Sifu says it will be 3 2 minute bouts with 1 minute of rest. Are there any major injuries that happen during sparring?