A part of my son's umbilical cord came off in 3 days but it was still attached to his belly button which was checked by his pediatrician who said that it was fine. Remaining part of it dried and came off without any issue and only a slight bit was left. I saw some bleeding in his belly button today and also a layer of dried blood on his belly button. He is 18 days old. What can be done in this case. We have kept the area completely dry since his birth.