New Mole in my Breast? (photo)

First, bravo to you for checking your body so carefully and getting something checked out so quickly when you thought it was suspicious. Rarely (I won't say always but rarely) does melanoma pop up overnight like this. I would get it checked, removed, and sent to a lab for confirmation. But don't panic or worry, you are doing the best thing by getting to the doctor quickly to have something abnormal looked at, especially if you've had things abnormal before.