My 2 week old only sleeps if held

Jo
HELP! We can get him to sleep when feeding, rocking, having him lay on our chest etc. but the moment we lay him down he is up and eventually fussy. We make sure he has burped and everything is good. This is becoming a problem of a night because in order to sleep I have to hold him, and during the day this is bothersome because I am attached down. Please any advice is welcome!