Yeast infection or something else?

My boyfriend and I fooled around this weekend. I gave him head and now my tongue is yellow. It feels like I could have a yeast infection down there it feel not totally itchy yet but acidic. We did oral and I remember last time I did oral with my ex I ended up having a yeast infection. It was so itchy but also it was finals week last year and finals week is approaching so maybe it's stress? It sucks. Does it sound like a yeast infection and does anyone else experience this?