Girls, my boy is 3 weeks old and every night he starts crying/screaming for no apparent reason,rejects a bottle, burps and still carries on, change his nappy, cuddle him, and the crying goes on for about hour or more at a time, a few times every night. He also kicks his legs and waves his clenched fists around like crazy:( Sometimes he drifts off then 2 minuets later starts screaming again. I feel so helpless because I can't calm him, why does he do this?