If you had been using diazapan for a while and regularly, yes, this is normal. Did you wean off of it? Tapering down the dose is the best way to go off it and lesson withdrawal. https://www.verywellmind.com/benzodiazepine-withdrawal-4588452 It gets worse before it gets better in the process but you have to stick with it. Your brain will return to neutral. How long it takes depends on how long you took it, how much and how often, etc. So, give this a bit more time but it should even back out. I'm sorry it is so hard and hope you have support?