Surely, there's always a negative impact to a gambler's emotional imbalance, whether it's during a winning or losing streak. Gambling is a game that requires a lot of calculations and brain work, and if a gambler is unable to maintain a leveled head when gambling, he's most likely to make the wrong choices, and like we already know, every wrong choice a gambler makes, is most likely to have a corresponding effect on that gambler.
Emotions will interfere with decision making, so it is better to take a break if you feel that now is not the time to play. I even see from myself that sometimes this break should be long, maybe several weeks or even more, because we are different and everyone has a different resistance to stress. If you do not want to worry about increasing the risks in gambling, then play for small money so that the risk is small, then the stress will be insignificant.