You have some major problems to overcome psychological, has nothing to do with your Trading Plan. Matter of fact your Trading Plan is not the one doing the trading. You currently not having a business, the business has you. People fail at trading because like most other businesses fail = POOR MANAGEMENT. If you had a Hot Dog stand, would you get upset at $1200 sale? If you bought the hot dogs for $400, would you be upset? If you paid $25 for relish, would you be upset? Trading is a business like any other business, you buy things and sell things, stop taking it personal, it will kill you. When you come to your computer, think it is some other business and you just buying and sell.
If you don't have well back tested Trading Plan, that will not help either.