If it is where you just shaved it is more than likely razor burn, BUT if you have even the slightest bit of concern that if could be something else and have been not always been "protected" then I would get tested. More than likely razor burn, but that fact that you are worried about it being something else seems like maybe you should test anyway. If you have been in a "compromised position" and you are worried then don't hesitate. Does this make sense? God I feel like a mom