Now, do you have a body sign that people around you can tell if you lose money in gambling, I'm sure all of us have one, be honest with yourself

I am not sure about this. But at least, every time I am losing, I will likely scream aaaaargh and hold my head. After that, I need several minutes to bring my heart back and control my emotion. Enough
Because I am aware that losing is very normal in gamblig. Wht'snot normal is when we keep losing and we keep gambling all over the time until we get loans.
In this case, it is also no problem to have the sign, but just be back tot he realita again and control your emotion wisely.