What to do if i think my yeast infection is back but from a few months ago, is that possible?

Yes: Recurrent yeast infections can occur. Yeast infections are due to a fungus called candida which is normally found in the vagina. However, if there is a lack of healthy vaginal bacteria it can lead to overgrowth of yeast. Some causes of overgrowth: antibiotics, ^ estrogen (pregnancy or some birth control pills), malfunctioning immune system & diabetes mellitus.