Sorry about your finger. I recently had a finger injury too. I went to the emergency room because it was a dog bite (to the bone) and looked bad. It hurt for about 2 weeks. If I bump it, it will still hurt and the injury was months ago. Now, I was told, in the emergency room...NEVER put peroxide on an injury. It not olny kills the bad germs and bacteria, but also the good. It is too late for stitches. Keep the wound clean and dry. Applying neosporin will help but keeps the skin wet and will take longer to heal. The skin flap will reattach but it takes a while. Trimming the dead skin is ok, but be sure that everything you use is sterile. Keep the wound covered during the day to keep dirt out. A bandaid will be enough. Wash you hands often to keep it clean and take some ibuprofin if it keeps hurting. Good luck.