Hey itsatruth...
I completely understand what you are saying and the feelings you describe.
After leaving my exah and divorcing him, I went through something very similar.
You've been through alot. I think the symptoms I suffered were alot like post tramatic stress disorder. Yes, check with a doctor if the fog doesn't lift. But no matter what, try to be really kind and loving with yourself. Pamper yourself when you can. I recall taking ALOT of long, hot bubble baths and letting myself ease up. I stopped worrying if the house was a little dirty. I let the laundry pile up. I just focused on getting some much needed rest and I prayed...alot. Things did get better. Slowly, the fog lifted. In the meantime, just know there are lots of people here who understand what you're going through.
Hugs and strength...