I'm 13 so I haven't had sex or done anything with a boy, but I think it may be a yeast infection because it was REALLY itchy, I just scratched it a little not meaning to but then it got to the point where it was unbearable, I went to the bathroom to check it out to find that it was REAL swollen ( like 2cm wide when it is normally like 5mm) so I told my mum and she said it sounded like a yeast infection and told me to take tablets to stop the itching. right now I'm lay in bed and I feel as though it has swollen even bigger and scared incase I wake up it the morning and it's like the size of a golf ball.. Mum said she will take me to the doctors but I'm REALLY scared for some reason. I was even crying.