Well I notice like a few days ago I have this kind of bruises with my vagina and anus I haven't had sex in months so I don't think it's STD and it Burns when I touch it or urinate.

Some STI take a while to show up, or only show up when your immune system is compromised. As well some skin infections love damp warm places that are around that area. I would go to your doctor and get a proper diagnosis.