itchy hoohaa

Has your vagina ever been itchy with no discharge and no bad smell? just all around it and in it is itchy... had sex for the first time in a bit over a month with my bf yesterday (we just haven't had the time to see each other or plan to have sex lol we don't live with each other yet) ... I don't think it's an STI... Been like this for about a week, maybe more... Could it be heat related?