Ouch, go easy on yourself girl! Yes, you could have caused some friction blisters and burns. You could maybe put a little vasoline on it or preparation H believe it or not works in that area for things like this. As long as you did not have sex or contact that could result in something like herpes which it doesn't sound like you did. This sounds like it is strictly limited to you rubbing yourself too hard. It may hurt when you pee as it heals and you can use a squirt bottle of room temp or slightly warm water that you squirt as you go pee to make it hurt less and it also may itch a bit as it finishes healing. That's a sensitive area and you have to be a bit gentle with it. good luck