recent burning

recently after my man and I have intercourse my vag burns(??? I can't think of a better word) but I would think if it feels that way it'd would burn when I pee aswell but it doesn't? have we just been having rough sex or is there a problem? it began a week or so ago and now I've been on my period for a couple days and I feel like it could be because of that but I don't know.