When Barry heard someone calling his name, he dropped what he was doing and went running. There weren't too many people who would call for him like that, unless something was really wrong, and he wasn't going to waste any time getting wherever that person was to figure out what was going on.
"What's wrong?" he demanded when he found himself near the medical center. "Christine!" Since the woman who seemed to be calling for him was her friend and she was near the medical center, it seemed like a good guess that the woman who was expecting his baby was in some kind of trouble.