Ds is 14.5months old, he has been happily self-settling for naps and bedtime for ages now and been sleeping through, he has a morning nap 8.30ish for 1-2hrs and afternoon nap from 12.30ish 1-2hrs, bedtime is 6pm. I've always followed his lead on sleep timing. This week he has been all over the place, he's randomly refused to go to sleep for some naps, other days has napped for up to 4.5hrs in total, some nights he has woken up and the only way to stop him crying is let him get up and run around but he then usually happily self-settles later on. The past two evenings he has screamed when I've put him down and again we've ended up getting him up for a bit, tonight he finally went to sleep at 8.30. I'm as sure as I can be it's not the heat. So I'm just wondering if this is a phase we can ride out or whether he needs to move to just one nap a day?