Technically, if the Astros were to sweep the Braves, that would be 12 straight, which would tie the club record. If they then won a one-game playoff, it would be 13 since those one-game playoffs do count in the regular season stats.
Still, odds don't favor the Astros. However, there is always a first time for everything. Cards faded like this in September last year too. No one could get a key hit except Pujols and no pitcher could hold a lead. Last night was the exception on pitching where both the starting pitchers and bullpen played well.