Hi @CarlosF_1504! Great to hear you’re continuing to learn! Looking through other posts I think some of what I’ve wrote might help @Big_Boss understand whats happening when he’s spooked out of a trade too.
Let’s talk a little about your comments on insecurity and anxiety. Where do they come from? Why is it they seem to pop up when we face a situation of uncertainty or when we are asked to deliver something where part of it is out of our control?
First think about performance anxiety/insecurity in athletes. Fully capable individuals with all the talent to execute. Yet they worry about if they can go out and get the job done. Why? They fear failure. They fear what people might say about them. They fear the fact that they might actually achieve their dreams. Sounds crazy doesn’t it? Yet we we fear any number of things that imply change, especially when that change is out of our control.
So if we accept that the the root of anxiety/insecurity is fear what can we do about it? Unfortunately this isn’t a “go do X Y” type situation. Ever seen one of those sports movies where the star is worried before the big game and the coach says something like “you have to go find the answer in your heart”. Well its the same here.
Your fear comes from a deeper fear that exists within you. Only you know what that is. So only you can spend time and come to terms with it. Two others on this thread have already mentioned meditation as a technique they use as part of their plan. Its not a coincidence, they’re working hard to understand themselves, listen to their heart, and root out the fear of uncertainty.
Whatever your fear, the anxiety/insecurity comes from projecting your current state of being onto a reality that only exists in your mind. What does that mean? It means that when fear is present we allow the mind to connect a present reality (market ticked against me) to a future reality associated with pain/pleasure/want/desire (I’m losing money!). We play out this false reality in our mind, consciously or sub-consciously. Once there is fear, and an association between what is now, and what could be, our body/mind start to perceive this future reality as if it were already true. When that “what could be” is a seemingly randomly changing number that you have little control over and that you have invested hopes, dreams, money, self-worth into that fear is going to transform rapidly into anxiety and insecurity. So the underlying fear has generated physical responses in the form of anxiety, insecurity, or whatever other manifestation.
So all of this is to help understand where it comes from. What to do about it is to understand why you got into trading in the first place. What brought you here to learning this craft? Write in a journal or mentally reflect but do so to understand your own feelings on the topic. You’ll have to be deadly honest. I got in to take more control over my investments. I was greedy, and frankly I feared not having enough (a silly belief, but true).
Once admitted I could calm down substantially when looking at the market, and act with detachment. Then you can develop all the plans, strategies, and tactics to arrive at high performance. Anything else I could tell you is a coping strategy, an effort to control underlying feelings that will ultimately break free.
I hope you find some use in my words, and that it helps you in your own way. Would happily talk more about it with you if you’d like 
Reading through that post was very enlightening! 
Instead of feeling disappointed and feeling sorry for myself, I could just do something I love to release the stress of a losing trade! 
I wonder why you call yourself badpanda when you’re really a super good one! 
Hahaha.