Baby's umbilical cord stump is barely hanging on. He's 16 days old. It was crusty with blood around…

Baby's umbilical cord stump is barely hanging on. He's 16 days old. It was crusty with blood around it so I cleaned it with warm water q tips and when I last changed his diaper it was hanging over the diaper. I've been letting it air out but it's been a scary experience with the little blood crusts and some dried blood under it. Ahhh baby was crying too so I thought I was hurting him but I think he's okay