The chance to roll 7 C's is roughly 0.00017% (that means you'd roll it once every 500,000 games, rounded down due to laziness). If you are concerned about dealing with that, well, I think you should be more concerned with how to spend your lottery winnings :p
That being said, I'd probably just continue the pattern.
Note: you are actually more likely to roll 7 C's than win the lottery, the above is a joke.