Feeling sluggish

34 days vape free here, just wondering if anyone else has felt so tired and sluggish since quitting? I vaped for around 2 years and started vaping about a year after successfully quitting smoking (smoked for ten years), and when I quit cigarettes, I can’t really remember feeling this tired then. I quit cold turkey and haven’t had any cravings and have been out drinking since but the tired feeling and the brain fog still feels crazy at just over a month in!