So my 3 week old son..

Bekah • Wife... And blessed mommy of 3 amazing kids... Due DEC 23rd with #4
I know babies are supposed to be back sleepers... But this evening my 3 week old son wont sleep on his back.. Only his tummy... Tried letting him fall asleep on my chest then put him down on his back. Woke up screaming.. Did the same thing for longer same result... Why would he do this???