I have had these symptoms and more for all of my life. Today, I am retired, exceptionally fortunate to have a union pension, but I am miserable and scared to death, every waking moment of every day.
I was a very committed drunkard for well over 30 years, and tapered off just before I retired. Of course, once I stopped self-medicating, depression came on with a passion, and has never left. Meds, at least what I've been prescribed so far, have not helped. The only things keeping me from checking out is the grandchildren and my PC gaming zealotry. I get on the internet and read about world events until I can't take it any more, and then escape into the virtual worlds of the games I play.
I am very glad that Mr. Wheaton was able to get the help he needed. I do not wish this mindset on anyone. The bleak, pitch-dark, deep end of the pool. I drown in it whenever my mind has time to itself.