Yeast infections

Ok so I have never had a yeast infection before and now I have what I am assuming is a bad case of one. It burns and itches and I have cottage cheese like discharge and now I’m starting to get like little open sores from the macerated skin (I already know it isn’t an STD). I’ve been using monistat for three days now and it has helped with the yeast infection, but I’m still have a lot of burning when I pee or even just walking from the sores. I don’t know what to do and I’m so uncomfortable. I just took a bath with only tea tree oil ontop of using the monistat but even wiping hurts too much. Any tips to help clear this up quicker?