To answer your question. You should go back to your gyno or get a 2nd oppion. Not all discharge is bad and sometimes its just the vagina cleansing itself geting rid of toxins and "bad bacteria" and we have good bacteria that protects us from it... The discharge can be an over production of bacteria and since its yellow it may just be bacterial vagonosis. You can get this by having a chemical imbalance in your body, hormonal changes due to menopause ( not saying your going through menopause), and even unportexted sex ( and no its not considered an std). But before you decide not to go to the dr ask yourself 3 questions; is there any ordor present, do you experience pain during intercourse (if you are sexually active) or during urination, and are you having pain anywhere else like in your pelvic region? Or maybe it could be a UTI you never know until you go see a dr or go to a community clinic and get test done asap. I feel you on not wanting to feel the pain, but you dont want to make it worse if its something serious because then you can damage your insides and get Pelvic Inflammatory Disease (PID). I pray that all is well and that you go see a dr. Hope this helped.