Hello. I'm a single dad to a 20 old month boy. He's never had any problems sleeping through the night before. But for the last 2 months he keeps waking up at night several times. I've tried to ignore him for a few minutes, but we're living in the flats and and there literally no sound isolation and one night one of the neighbours called tge police on us after 10 minutes of crying. To be fair he is very loud. So now every time he wakes up at night, I just pick him up and wait for him to fall asleep and put him back to bed. Which probably encourages him to cry out for me. I don't know what to do. Any advice would be appreciated. Thank you.