I not sure if everyone regret just a day or two because someone who has a healthy mindset after regret a mistake at gambling he will not come back and stay away from gambling.
If someone is like that, that's a normal thing for a gambler to experience. Regrets are always at the end of the action that we do and if it's with gambling, whenever we lose a little or a lot of money, we're there to just admit the mistake and then will call it a regret and will think of something better. It doesn't matter how long has been one able to regret his actions, be it one or two days after he has gambled as long as it's the end of his gambling activity then that should be still enough to say as a regret because it's at the end of it.
While feeling regret once we have lost more money than what we wanted during a particular session is a good sign, it is important that actions are taken based on that regret, as there are a lot of people out there which regret what they did but when presented with the opportunity they do the very same thing they regret anyway, and in that case regret is useless, gamblers need to use those feelings so something like that never happens to them again, otherwise it is pointless to feel that way.
we always get that feeling of regret when we have lost a particular game,but that does not guarantee a stop to it,theoment you are used to gambling,that is to say that as long as you have turned an addict to gambling, whether you have that feeling of regret or not,you will still go again gambling because it is already in your blood,and there is nothing you can do about it except you travel entirely from that particular location that you were going on daily basis to gamble.
We all know that gambling is a two way thing,and the believe that one day,it will surely be our turn will not let us stop it.I know how many times I have gotten rid of my phone just because I don't want to gamble,I regret sometimes when I have lost,but the most annoying part of it is that I won't still stop because it is already in the blood stream.