hormonal imbalance the yellow could be caused by the increase in progesterone most people get it after ovulation the brown discharge is probably old blood or when u inserted the monistat u could have scarred
your vaginal walls or there was blood left after AF
If it still itches and the monostat did not work, it could be what is called Bacterial Vaginosis (NOT an std). I get them more often than YI's and they are very similar so most doctors will treat for both if they did not do a culture to actually find out. Treatment for BV is metronidazole or clindamycin (both antibiotics). Ask your Dr. if this could be the problem. There are always bacteria in the vagina but when they get oout of wack you can get BV. Hope this helps!