What Does A White Patch With Redness And A Bruise At Vaginal Opening Suggest?

Hello, I m a 19 year old female, and recently when I was wiping after urinating I unconsciously may have wiped too aggressively, because when I did I felt slight pain. It had been sore afterwards but I didn t think much of it. Now, after checking periodically the area right near the opening of my vagina was at first red a little bruised and now, there is a white patch it also stings which I assume is from friction when my legs are not spread apart. Did I do any real harm? Is this white patch part of the healing process? It does not look like a blister or anything of the sort.