DD will not take naps and will only go to sleep at night once she falls asleep in the acrrycot out for a walk with dad! last 2 days though she has slept in her pram suit and fallen to sleep with no problem during the day..not had to take her out in the carrycot...2 hour sleep in mid morning and 2 hour sleep mid afternooon. DD is 19 weeks old....are these daytimg sleeps too long and should I be worried that she'll only sleep if I put her down in her pram suit?!