For the last couple of weeks his sleep pattern has been seriously messed up and I cannot get it back to normal. He had a late night one night, followed by a lie in, and has started napping in the day again (in the car - I think the warm weather isn't helping in this respect). He had been a wonderful self settler for more than two years so we're really struggling, especially as we have a 3 month old to look after too.
I can keep him in his room with a stair gate but he just stands there screaming, crying, yelling my name. It's awful 
His bedtime is 8pm usually but now it's gone 9pm before he goes, even if we sit with him so no evening left for us.
Sleep training a 6-9 month old seems so easy compared with what I have to deal with now. Guessing the same rules no longer apply!
All suggestions gratefully received.