What Causes Yellowish Vaginal Discharge With A History Of Gastric Bypass Surgery?

im 37 yo and 2 yrs post gastric bypass..i have been having a constant vaginal discharge -odorless-thin -clear/yellowish and lots of it!!gr sys no std-no yeast-no bv but also has no answers..i have taken diflucan,flagyl,metrogel and it works until the day i stop. gushes out like my cycle suddenly started. i do take 5hr energy shots along with citalopram but im not sure if that is the problem. several drs have run tests but no answers!!