I know exactly what you are talking about.Im 37 reaching a slow down age and have the anxiety problems too.This is one of the hardest things in life to deal with.I try to explain it to friends and family and their reply is you think about it too much.And because of the way my mind works I do think about it too much but that is my problem that I cant fix.I get so tired through the day from just stress and anxiety.I have to take several power naps a day.I cant even hold a steady job no more.So I completely understand.Awful feeling !!!