Do I have thrush, someone please help?

I've been really itchy down bellow for a few weeks now, I'm only 14 so I'm only just really growing hair properly down there but I don't know whether that's why. I did start having a lot of discharge but that's kinda not as bad now, and the itching has calmed down a bit but its still there. One side of my vagina is the itchiest and seems really red and dry. I've done research so I think its thrush, some people say you can treat it yourself by eating yoghurt and stuff but others said you cant. I'm to embarrassed to tell my mum and I definitely don't want to go to a doctor, I'm embarrassed to tell anybody at all. Is there anything I can do to help it? I know it sounds stupid but I've never had any problems like this before so I'm pretty scared. And by the way, I've never shaved down there before so could that be making a difference? and would washing it more often help? I've also been having belly pains sometimes, but I'm not sure whether that's just with periods. Please help me!