Ive battled with addictions of various forms myself over the past 15yrs.
The best short version of advice i can give you to stop you gambling is DONT START!!!
Make it not an option fulllstop!! if you start it will set off you addiction/compulsion to gamble further and you know yourself once you have started you wont be stopping till your broke!!
It sounds like you have a massive gamble then shit yourself cos you blew it all, so you save get back on the straight and narrow again only to repeat the vicious cycle!!
Does you head fuck with you?? ie tell you things like just have one go it wont hurt??or im having a shit day ill just have a one gamble and ill feel a bit better then?? etc