DS is 16 wks and I am trying ssh pat to get him to sleep, however he goes from crying to asleep in seconds so don't get a chance to put him down sleepy. He starts fussing as soon as we go into his room and then the crying starts. I swaddle and start ssh pat. Usually have to ssh very loudly to break his crying and often need to rock/ bounce him also. Usually takes about 15 mins then he goes from crying to asleep in seconds, so he is always asleep when he goes into his cot. He'll only sleep for 30-45 mins. I sometimes can get him back to sleep if I pick him up and rock or ssh pat and get another 30-45 mins. I've just moved him to a 3.5 hr easy as he wasn't feeding well. What can I do?