If you plan on trading profitably one thing you have to learn how to do is take a loss on a trade. Obviously no one wants to lose money but the fact is when trading you will have trades that are losers. That’s the nature of the beast.
In fact, the psychological/emotional issues we all have about losing money and our inability to cope with them is one of the primary reasons traders end up losing all of their trading capital.
Many traders will set a mental stop for a trade and when that stop gets triggered they make a rationalization that keeps them in the trade. They will tell themselves that they have a good feeling about the trade and will bend the rules “just this once”.
What almost always happens is that the trade continues to deteriorate and the losses keep growing. Now they say they will get out if it drops x points more or if it rebounds to y they will sell.
They yearn for the option to exit the trade if it could just get back to break even. That would make them happy and they would settle for not making any money on the trade.
I might mention here that hope and gut feelings have no place in trading and as soon as you change the rules on an open trade you have in effect begun a new trade with new rules. Think about it.
Have you ever said these things to yourself? I have and almost every time I “bent the rules” I paid dearly for it.
Losses of $1,500 soon become 4 and 5 times that. You do that a few times and you soon learn a very painful and expensive lesson…
Stick to your exit rules. Play by the book. Follow your system and trading plan.
There, I just saved you thousands of dollars if you will just listen. 
The best way to overcome this anxiety of losing money trading is to think of it is a cost of doing business and trading must be treated as a business.
Just as a grocery store will have to throw away spoiled food and take a monetary loss so you too will have to get rid of a trade that has gone bad.
Keep that in mind along with the old trading saying that the first loss is the best loss and you will be on the right path to trading success.