This must be uncomfortable for you but if you have an open wound anywhere on your body that you suspect is deep enough to warrant stitches then it is important that you see a doctor. Even though the cut may heal on its own, having it treated can both help to prevent scarring and prevent infection from getting inside and causing further problems. Also, keep in mind that doctors are not there to judge you, they are there to help. As embarrassing as your situation may feel to you, believe it or not, they have probably seen the same thing before, if not worse and are just there to help make you feel better.