Good Afternoon : I Am Experiencing A Vaginal Yellow/green Discharge

Good Afternoon : I am experiencing a vaginal yellow/green discharge from my vagina. I am also red
My rectum is very itchy and seems to be very irritated. It is uncomfortable when I have moment and must wipe and leaves me itchy and burning. Any thoughts?This has been going on for over 3 weeks. I have seen a physician this past Monday who prescribed metroNIDAZOLE 500 mg tabs 2 xs daily however this discharged is still present. For the rectum is recommended cleaning with only soap and water to not to use the cleansing wipes any longer.