Tanny, you do realize that the drops are random? And that with randomness, there is never any guarantee?
I mean: if you play any random game, you must be prepare to the possibility of losing, however high are your chances to win.
Toss a 6 faces die 100 times: there is the possibility that you will never roll a 6...

You had bad luck this event, it sucks, but that's life, man, you cannot always have luck on your side. Most people learn to live with it though...
If you cannot deal with your lack of luck... Maybe play chess? (i'm not being sarcastic here, i mean my words).