This may not be the answer to all your issues, but it may help just a little bit...Go to Youtube.com and type in "Heal Thyself" It's a wonderful 30 minute meditation that helps you slow your breathing and calm your thoughts. Maybe the link will work...
Also, my cardiologist says brain fog is a response to a drop in blood pressure. Drink lots of water, extra salt and lie down to see if it clears. Maybe do these things and listen to the medication I mentioned.