CHICAGO — The Blues concluded their rough stretch of schedule with a thud Saturday. Playing their 10th road game in a span of 13 contests — and their second away game in as many nights — the Blues couldn’t overcome their miserable start against the rebuilding Chicago Blackhawks. They fell behind 2-0 in the first period and struggled to a 3-1 defeat. The Blues lost eight of their 13 games during this difficult span to fall back to .500 at 13-13-1. They will try to regroup this week with a three-game homestand, their longest stretch at Enterprise Center since their four-game span from Nov. 3-9. …