My 3.5 year old is destroying everything

My kid has been destroying his room at bedtime. Last night he pulled his blinds off the window and tonight he’s destroyed 2 of his favourite stuffed animals and pulled apart his dresser. I’m at a loss because he’s so tired but won’t go to sleep until 1030/11 and wakes up at 5/530. He won’t nap and he’s not feeling well. But every night for 2 weeks he’s been doing this. HELP!!!!

His dad and I are splitting up due to him cheating and he’s now living at his parents while we deal with divorce and custody. He spent 5 hours with his dad today and things have gotten worse with bedtime tonight. I need help as I’m 20w 5d with my second son and I’m supposed to be on bed rest!