You managed over 40 days of not gambling, you can manage 40 more, then 40 more until it is 400, 4000 more …
Don’t let this setback pull you off-track. As has been said, don’t chase your losses, focus on the positive that you did stop for over a month and you can do that again and again. Know that being with friends who are likely to go to a casino is a trigger – find other friends? I know that sounds harsh, but ask any smoker and they will say being around other people that smoke is too difficult. Your recovery comes first. Is drink a trigger? You know what you need to do. Be strong, get support and don’t let this put you off. You can do this.