Hi, I Think I Have Had A Yeast Infection When

Hi, I think I have had a yeast infection when I was very young. I am now 17 and about a month ago, I thought I had a vaginal yeast infection as there was itching, swelling and thick, white discharge. I let it run its course as it wasn’t that bad. The symptoms started to go away and I then I got my period so I couldn’t really tell if there was an odd discharge. After my period, I noticed that I have a greenish discharge that is kind of thick/cream like and I’m not sure if that is a symptom of the yeast infection I “thought” I had. If so, will it go away on its own or what can I do to get rid of it. I do not have time to visit a doctor or buy medicine any time soon.