HELP My 3 year old hasn’t slept through the night in two months. He used to be such a great sleeper.…

HELP

My 3 year old hasn’t slept through the night in two months. He used to be such a great sleeper. He was sleeping in his own bed in his room and my mom broke him of that habit when she was living here and had him sleeping in her bed every night for about a month. Then in November, her suddenly moving out threw him out of his routine. Since her moving out he has yet to sleep a full night for us. We’ve tried everything. I’m desperate. Please tell me somebody has gone through this with their older lo. I’ve talked to his doctor and all he recommended was melatonin every night but that just wires him.