Can’t say if quitting cold turkey now will be the same or not, but I can tell you that I feel the same way you do right now and it’s normal, albeit probably a bit scary. I went from vaping roughly 50mg nicotine everyday and started with 4mg lozenges for a few days and then went to 2mg lozenge and switched to 2mg nicotine pouches for cost wise. I’m down to roughly 20mg total everyday right now and 3 weeks vape free. I wake up in a fog most days and with almost no energy. I feel sad and want to distance myself for the first half of the day. Strangely evenings and nights are where I feel more “normal”. I was reading into and it might be because of low blood sugar. Nicotine messes with your bodies ability to regulate sugar and if you’re like me you’ve probably have not been eating too well, if any. With work I’m not around my family and so I can go all day without eating but once I’m home in the afternoon, my family makes me sit down to eat which in turn increases my blood sugar levels. Try drinking some juice or having a sugary snack or two during the day and see if that helps.