What do you do when you take a loss?
I use to feel depressed and really emotionally affected whenever I loose money trading, and I always found it difficult to trade after for some days because of fear of loosing more money when I am trying to make money instead. After finding out that even the most professional traders still loss from trading, I became more strong emotionally and prepared for situations where I loose. Now after I loose, I try to accept it first, and then see reasons why I lost so not to repeat that mistake. Learning about mistakes can help you avoid them.
We are afraid to lose because we don't understand yet fully how trading works as we expect that we will make money rather than lose. Sometimes, we get influenced by our positive mindset and confidence, and can't dare to accept losses. And after experiencing bad things and several losses, we then think about quitting. It is very common, we feel doubts and uncertain about how this thing works but other traders are saying "Those who can't endure risk and losses, have no chance of getting rewards.
To become a(pro) trader is not magical that in tomorrow we become successful already. No traders have not experienced losses, we all have but because we are certain of our goal, we still continue and learn from our mistakes.