Anyone having umbilical cord issues?

MomOf2 • Married 💏 DD:4yrs old 👑 Angel Baby 5/6/2014 👼 My Rainbow Baby! 5/21/2015 👶🍼💙
Currently at the hospital , my baby's umbilical cord fell off at 5 days old- super fast! It looks like it didn't dry completely and yesterday at his 2week check up , the pediatrician put silver nitrate or whatever it's called to help it dry where it wasn't dry. 
Today the skin is like falling off, looks like a scrape around his belly button? I hope it's okay, I'm just wondering if any of your LO's have had any issues...
Thank you for reading x