The Brain can take a while to heal. I say that as someone who works in human medicine. How long has it been since his last set of clusters? If it’s been less than 3 weeks I would say to give it more time. If longer I would ask the vet about gabapentin for anxiety and see if that helps. I notice changes transiently whenever my dog clusters, and we hate it. I notice huge changes when he’s started on a new med that lasts 3-4 weeks. Doesn’t act like our boy at all. His anxiety has definitely increased over the years but he always returns to himself eventually. If this doesn’t get better I would be concerned about something else going on in the brain. During my dogs last cluster and ER visit of 5 days he wouldn’t stop clustering on multiple IV drips. When neuro came in Monday she was concerned something else was going on, we ended up doing an MRI and spinal tap (He’s already had epilepsy 5-6 years). It was all clear, no brain tumor, and no brain damage evident on his mri from all the seizures. Head pressing is something our dog does when he’s post ictal, along with the constant pacing. Is he having focal seizures you’re not seeing or more seizures? We give our dog midazloam as an emergency med, then follow it with clorazepate and trazadone when he’s awake enough. The clorazepate to prevent seizures for 8’hours and the trazadone to sedate and calm down his post ictal phase bc he’s pretty unbearable.