Granted winning is not guaranteed, but have lost to 12% since joining the house early January.
Sometimes you just have some bad luck, however the amount of day is not important when it comes to gambling is the amount of hours and dice games you have played, if you have played a lot then I'm not surprised by your losses, in fact your loses are small since there are many that have lost their entire bankrolls in less time than that.
If you are on gambling. Accept the fact that most of the time you will loose. But, if the luck is on you. You can win huge amount in just a matter of time. Also, it is also a matter of timing, maybe when you played the bankroll isn't on your side that's why you suffer a loss. Try changing the time of your play hours and find the time when you are winning a lot. Then stick to that time and see if there is an improvement with your gameplay.