Sleep on stomach

Ludenie • Married to the love of my life, and we are expecting our first child April 29, 2015. We are super excited. 😘😘👶💍❤️
My son just turned 1 month yesterday and I just found out today that he likes to sleep on his stomach. He does not like his crib. We tried putting him in it, but he refused to stay in it for more then 15 min, even when he's asleep. He would only sleep on my chest. Sometimes I would leave him in my chest for hours. It's dangerous, I know.   He's been napping for 2 hrs now on his stomach for the first time, and he's been sound asleep. I've been watching him for the past 2 hrs non stop. I would never leave him alone on his stomach. They say it's bad putting babies that small on their Tummies to sleep. Has anyone have/had this problem before?