Masturbation

Anonymous
I'm 16 and I recently found out by my friends what masturbation is. They explained it to me and said that girls masturbate by fingering themselves and that it's totally normal, and a lot of girls do it. So later I tried it... I didn't enjoy it, I mean it didn't hurt or anything but, I didn't cum. Is this bad? Do I need to see a doctor? What does this mean??