I am desperate

My two year old son has been refusing sleep for the last week. It takes hours to get him down and then he wakes up around 3:30am and doesn’t go back to sleep. I am truly baffled because I know this child is completely exhausted from his lack of sleep. We dropped his naps when he was 18 months old in hopes that it would give him & us a better nights sleep. When that didn’t help, we tried to start giving naps again but he absolutely refuses. We have a 5 year old as well who has to be up at 6am for school each morning, and he is suffering as well. They share a room and we have to move him somewhere else every night. I feel so bad for him especially.It is so hard for him to get up in the morning and he comes home from school extremely tired. We have a small house and nobody is getting sleep at all.

We are happy to co-sleep with him if that’s what he needed but that doesn’t work either. Once he is up and with us he thinks it’s time to play and nobody sleeps. Please help me I am absolutely exhausted and can’t do this anymore.