It is sad to read this.I had a similar situation 3 months ago.Ididn´t lose my whole bankroll,though.It was during the Pan American Games in my city Lima.I had about $60 of bankroll and I had one day to open a Chest on PokerStars.So, I was watching a women´s soccer match between Colombia and Costa Rica.Colombia was winning the game 3 /1 and only 5 minutes left and also was dominating the match.I decided to bet $30 to Colombia to win..It seemed more likely a fourth goal from Colombia than a second from Costa Rica..But first a terrible mistake of colombian´s goalkeeper at 87min and . then a mistake of defenders and the 90 minute match ended 3/3.I was really shocked at that time but thinking better after some minutes I was aware I was wrong .I learned from that lesson ,that ,maybe, one bet seems to be so easy but it can turn out to be a egregious mistake.Fortunately,with patience,I almost have the same bankroll before that $30 dollar bet.I hope you will feel better.