I hope I don't appear to be strange or weird, but once sober the mind is going a drastic change. Think of autobiographical memory which is personal and self reflective thoughts and memories through experience. And then cognitive memory like learnt tasks, logical reason, and the ability to focus beyond yourself.
The limbic system in the brain regulates mood, heart rate, sweating, and feeling flustered. It also regulates hormones that control mood and survival, it also gives us coarse of action for outcomes that match our mood. It also attaches emotional pain and pleasure to events and memories. Also of these attributes are suppressed with drugs and alcohol, and tend to be typical withdrawal symptoms.
Its the reason why people don't feel themselves, "two voices in their head" disappointment and fear of the future, ashamed, guilt, and sometime suicidal.
I tend to believe all these thoughts is natural from someone that is healing. Congratulations on the 36 days!