Eye abnormality & brain fog, headache.

I quit smoking & alcohol on 3rd Jan 2020. It's more than 6 months still I'm facing some problem. Initially i faced irritability,anger,mood swings, constipation,insomnia, fatigue & all other withdrawal symptoms. Now I'm having abnormality in eyes,fuzzy head/brain fog & headache. I consulted a general physician (MD).After listening to me,he told me to get tested with Thyroid,Type1 diabetes, Complete blood test. But in report,All is well except low RBC. By the way I'm deeply addicted to cigarettes for 10 years & addicted to alcohol from last 1 year. I quit both at same time. I searched a lot whether this is a withdrawal symptoms or any other disease. Generally nicotine Withdrawal symptoms completely go away in b/w 1-3 months.But it's more than 6 months now. Also i found some exsmokers have written that they were too much addicted to cigarettes & they felt withdrawal symptoms more than 6 months & upto a year. Please help me. I'm going mad.