If you have lost your confidence in placing bets, it would be better to take a break from gambling activities first and after you regain your confidence in placing bets, then start betting again. Of course, this would be better than forcing yourself to bet when you lose your confidence in choosing the bets you will place.
After you force yourself to bet, get ready to be losing too because they both work together. If you notice that you are forcing yourself to gamble then just know that you are gambling because you think it is the best way to make money and you are either addicted already to gambling or getting to that stage. Forcing yourself to gamble puts you in a situation that you have to make profits to keep yourself happy but since you can not be making profit always, you will find yourself most time sad. If you are not feeling relaxed gambling then you are doing it wrong and you need to stop immediately or change the way that you are gambling. It could also involve changing the games that you play and the type of gambling that you do.