My 3 year old LB has previously been a good sleeper - as in down for bed sleeps all night. For the last good few months, he has started just laying awake at all hours of the night? I wake up to feed our baby (baby isn’t waking him as he actually doesn’t really cry in the night and we are 1 floor above LB) and i check on his monitor, he’s always awake? Just laid there wide awake at 1/2/3/4am??? i find it impossible to go back to sleep so i just lay awake watching him laid there wide awake?! He then does usually fall back asleep 5ish and will get up about 6.30/7! he’s extremely whiny ALL of the time, so cranky, cry’s at anything and i do feel this is why. I have absolutely no idea what to do? He has a consistent bedtime of bath/book bed, sleeps with white noise on, nightlight as he doesn’t like the dark. I don’t really go down to tell him to sleep as i find that wakes him even more engaging in conversation with him. Any ideas!?