After Having Sex The Day My Period Ended, I Started

After having sex the day my period ended, I started having discharge that has a pink/brown hue and looks like hamburger meat/cottage cheese mixture every time I wipe. There is a slight odor, stinging/burning pain when I pee, and itching around the vaginal area. I am thinking it is a yeast infection with some leftover period clots coming out, but I'm not too sure. I am used to having yeast infections at least once or twice a year, so I thought that is what is happening, but I've never had discharge that looks like this. Can you help me?