Dog suddenly stopped sleeping at night

We've had our rescue dog for now 8 months been medicated for the last four with prozac & gabapentin due to his mild separation anxiety that did wonders he's around 4 years old.

Last two days he suddenly will not sleep through the night anymore. He was attacked by another dog and left with minor injuries about two weeks ago. Checked out by the vet and clean and clear no pain, no tummy issues, just finished his meds, nothing wrong. But will not sleep through the night. Daytime while were at work hes fine. But at night he'll whine and throw himself at the baby gate to "his room" and tonite he finally broke it down. Will only settle in the same room as one of us. In our bedroom he will whine until hes on the bed. For safety reasons he cannot sleep in our bedroom every night and if my parner and I do sleep separately our dog is a bed hog and sleep farter (they reek when hes anxious). And I get 0 sleep as the chosen human because im woken up by the farts or am uncomfortable. Im so frustrated and tired and dont know what to.

Tried pre bed kong, long walks, always has calming music playing at night, turned lights on, turned lights off, tv on, tv off. Dinner is 3-4hrs before bed. He just pants, circles whines, will not settle all night, and jumps at the gate. Currently hes at my feet while I sit in my office asleep on the floor. His routine, food everything has been exactly the same. Does anyone have any ideas or suggestions until we can get an appt with a behaviourist? My partner and I both work a lot but split shifts; only 2 days a week is he home alone for 8-9hrs but has never been an issue before and isnt currently just at night. We're at our wits end of two days with 3hrs of sleep.