Has Anybody Has Brain Fog Before Quitting?

I'm deeply wondering about this. I hear most experience cognitive impairment during withdrawal. I've had brain fog for about 2 years during my time smoking weed. I somewhat knew that pot just wasn't for me but it relived my anxiety and helped me sleep at night. I sort of knew it was probably fogging my brain but I was addicted. Anyways, 7 months sober still feel kind of lethargic and apathetic. I never really like myself. I'm constantly tired and anxious. The world seems dark and there's no motivation. Anyways my question has anybody experience the symptoms before withdrawal or is it only me?