Honestly, I have never been in a situation like yours. In fact, those who have gambled for a long time, they can never completely give up gambling. No matter how much they say that they will not gamble anymore, they cannot be completely without gambling.
We should always gamble seriously, the more you gamble on emotion the more you lose. That is, now that you've lost, you'll want to gamble more just to recover that lost money, and the more you gamble emotionally, the more you'll lose.
So we should do a better research on the subject that we lost the first time, so that we don't repeat the same mistake in the future. Then you can easily earn more than your lost money.