Yeast Infection-14 year old girl? Help?

I would say the most important thing for you to do is see a doctor. I will probably be a hell of an awkward conversation with your mom ( I would know, I'm 14 too and have had my fair share of awkward conversations with her) but it could be serious, especially if its been going on for so long. If you go to the doctor, you can request a female to examine you. Also I know this sounds weird, but when I get itchy down there, I sleep for a night without underwear on (just light loose shorts.) It will make you feel a lot better and hopefully relieve your itching. Also peeing on stick is only done for pregnancy tests. If anything they will have you pee in a cup or examine you. It will probably be uncomfortable if they examine you, but they do it all the time so they couldn't care less. Also its not like they're ever gonna see you again...