How Can Recurrent Yeast Infection Be Treated?

My name is Ana Hall. I am 19 years old. After having unprotected sex white foam appeared on the penis and when I push it started to leak out of the vagina. It didn't had an ordor and it didn't itch. What does this mean ? Also, I am having a problem with reoccurring yeast infections. I was told that I have endometriosis by a doctor. Could you help get rid of the infection once and for all?