CONGRADULATIONS!
I'm so sorry to hear about BB, get him on a heating pad a.s.a.p. slightly cover him with a washcloth or towel to keep warmth creating a incubator!
you can also put him up against your skin (chest area-not to sound funny but between your boobs!)
natural body warmth is the best! did he at least get some milk in him after birth yesturday?
please do not feed him if he is cold his body's temp has to get warmed up first or feeding can kill him.
I pray for you!