After winning or losing a bet, we lose sleep in two cases. We lose sleep due to excitement. When we place a bet, we feel extra pressure in our head, and sleep is lost due to that extra thinking. This problem occurs most in those who cannot tolerate mental stress. This happens more to beginners. When I first started gambling, I did not sleep well that night. However, I got used to it with the change of time. I believe this problem happens to every gambler for the first time, but it is possible to gradually adapt to the change of time. So I think there is nothing to worry about, it is normal.
If you are too stressed then maybe you should lessen the amount of money you gamble with. Some people might be genuinely distraught because the money they just lost would actually be something they need in order to survive that is why they are losing sleep over it.