im 14 years old, turning 15 in 2 months and when i masturbate i can only pre-c*m... and sometimes i don't even pre-c*m... like i can inside of my pen*s i can feel it either trying to pump out c*m or hold it back... i don't know if thats normal but sometimes nothing comes out.. and when im like super super horny i pre-c*m really fast and one time i actually saw white stuff in my hand.. but it didn't shoot out like a cannon, it just overflowed like lava... is this normal? am i infertile?? am i too young? plz help