It's been like this for 3 days.
He'll take his first nap and wake at 10.30am then won't sleep properly again until gone 1am. Today I was lucky and he slept 5.15-6.45pm.
He is absolutely tired but will not stay in a sling for me to get him to sleep, the pram doesn't work either.
Any ideas as to what could be causing this and how to combat it?