You have started gambling by setting your limits, but your emotions will make you forget your limits, many players know very well when to stop or how much is safe to bet, but when emotions are not in control, you can easily exceed your limits. Gambling is a pastime, it is not a place to win money, so just enjoy gambling, and keep it limited to entertainment only, excessive emotions force people to cross the limits, so I would never let emotions go out of control.
You're right. Gambling has a way of messing with people's emotions and making you completely forgetting those limits you initially set for yourself before you started gambling, this is actually very normal amongst every gamblers, so it's up to you to decide whether to role with the tide or take a break and carefully think about your next move. We are all humans and no human is perfect, we all have our weaknesses and strengths, and that's why it's important for every gambler to identify their strengths, hold on to them and then work on your weaknesses. That is why gambling is best enjoyed when you play for the fun of the game and not for the financial benefits, because this way you tend to be more control of your emotions