well naturally, my dear, in fact I do consider that this feeling is the worst feeling that you can afford in this business but this depend on how much you lose , nobody likes to lose his money in trading but if you trade with a good money management you will not get a huge loss because you know how much you will lose in every position. of course after getting big loss i get sad and feel bad as i have lost my all money but after some times i started to analyze my mistakes and promise myself to not repeat these mistakes in future to avoid big loss and start to earn some money as well so learn from your mistakes to become a successful trader