The gambler's emotions can go up and down along with the wins and losses he experiences so if he can't control himself, he can get stuck in a situation he doesn't want. His losses would also be even greater than before, especially when he deposited more money into his account just to continue playing. But that will not prevent the addicted person from depositing money. They will continue to play if they have money in their account or wallet.
This is true. Emotions play a big role in the chances of winning or losing the game. If you don't have enough mental headspaace to grasp the things happening and is currently experiencing negative vibes, you should definitely stop playing. This is to avoid the higher possibility of you losing in the game. The moment you knew you are not mentally capable of playing because you are already low-spirited, you should slow down and take a break.
Chasing winnings won't do you any good. Instead of winning, you might end up losing in repeating manner without you even noticing it because you keep on playing just to win. Strategies and risk analysis are essential in winning the game. If you can't do it at your present state, then do not play and bet. Otherwise you'll just lose your funds.