My 9 week old sleeps beautifully at night in his cot (7.30pm-6am with one wake up, most nights!) but the past few weeks he REALLY fights napping during the day at home. Naps in the stroller, car, Ergo carrier are all fine. But naps in his crib or bassinet are a daily battle.
I'll manage to get him down only if I rock him to sleep, but 25 minutes later he wakes up and screams the house down. He's definitely tired as his eyes start to close the instant I rock him.
I've also tried a white noise app which has worked well at getting him to fall asleep, but same problem after 20-25 minutes - he can't self settle. Weird since he obviously self-settles at night?? Another weird thing is that from birth - 6 weeks, he used to have no problem taking mammoth 2 hour naps in his bassinet.