He is 12 weeks old and is ok at getting off to sleep at nighttime, when we swaddle him. But he always really fights sleep during the day, gets horribly overtired and then cries and cries. We then usually walk around rocking and shushing until he finally falls asleep. Do we need to 'teach' him how to self soothe at this age, or is it ok to do the rocking? tbh the walking and rocking are knackering so it would be great if he could get off to sleep without it..