As above, i have a previously decent sleeper (I mean he woke a few times at night but quietly and always went back to sleep straight away after feeding/changing). The last two nights he’s woken from silence to hysterical screaming every 2 hours. Takes about 5 mins to calm him. He doesn’t seem awake but goes from 0-100 within seconds. It’s frightening. He has a mild temperature - could this have contributed? Is it a phase? I’ve not experienced this before and have a 2 year old. Help help!