For the ex-smokers out there, did you suffer fatigue after quitting? I’m presently in week 7 having gone cold turkey without any patches, vape etc.

I’ve given up for as long as 5-6 months previously but this time I am totally exhausted. The fog just won’t lift and I’m wanting to go to bed by 8pm nightly. I don’t recall feeling like this before and concentrating at work is becoming increasingly difficult.