I had a yeast infection but never got it treated as I never knew what it was until I researched it but by then it went away on its own. Ever since after then I ave been experiencing on and off itching and burning and a yellow green discharge which I see in my under wear everyday. It's very uncomfortable and I thought it would go away on its own but it has been awhile now and am getting concerned, I would see a gyn but I jus turned 18 and I do not have one. Is this an infection? Would like to know someone please answer.