WackyHaving 50,000 shares and seeing $500,000 go down the drain would make me wackey too! It never ceases to amaze me how investors , in general , do not have a clue when to sell.
Your situation is an excellent study in profit avoidance. The simplest of TA would have taken you out with at least $300k before the trend change.
Keep the faith: buy, hold and pray.