progesterone insufficiency
"The first two years on 100 mg were ok with a very rough 3 month adjustment period of feeling emotionally and physically completely wacked out. After two years I started feeling menopausal symtoms of brain fog again so started taking 200 mg. This is my second month, emotional roller coaster angry outbursts, racing heartbeat, no sleep! I am giving it another month to see if things 
Will get to normal like before. Maybe I have to go through this every several years, part of getting older."