What Causes Itching Around The Anus With Bad Odor From The Vagina?

hi, my anus and around it have been itching really badly for like 3 or 4 days now! i dont know what to do. Plus, i have a very funny smelling vaginal discharge, and it started the day after my period ended like 6 days ago, although the smell has reduced a bit but i havent taken any treatment for any of the above.