extremely bad yeast infection

A few weeks ago I went to the doctor to get tested cuz I was sure I caught something. My vagina was extremely itchy especially inside. Turns out it was a yeast infection/bacterial vaginosis and a uti so I was on some antibiotics and it seemed to help but here I am a few weeks later with the same problem again. I just had my appendix removed (it was an emergency) and I had antibiotics from that. What should I do about this?! Go back to the doctor? Is there any way I can treat this over the counter by myself instead of more antibiotics? I'm just worried I'll be taking too many and I won't have any bad bacteria left and I don't want cdiff. What can I do to relieve the itching and pain without my doctor? Or is t just best to suck it up and go back?