If you know what you know, you place your trade without fear. Changing your mind on fear will be a losing trade. If you are wrong, you need a new strategy, but when you are right, set your stop short and trail it to your exit, for the most pips of profit.
It is true that we should not pur our self in deep fear of loss. There are only 2 possibilities either profit or loss. So make good analysis and do right steps for trading to avoid loss ,Slowly you will gain samll profits that will make you more confident for trading .