Labor repeat?

Most everyone I know, knows the story of how I went into labor with Darren. I rescued Nathan from crossing the street when I was a few days overdue, and fell on top of Nathan. On Tuesday night we were at the neighbor's across the street (the same house that Bruce was at when Nathan tried to cross the street to see him two plus years ago). We were getting ready to head back to our house when Darren darts out into the street. He is probably two or three feet off the curb when I grab him by the back of the shirt and pull him back. As soon as he is on the sidewalk, I let go and try to calm myself. My heart is in my throat and it is beating at 200 beats a minute and my stomach is clenching. I was half afraid that the fear of him running into street would cause me to go into labor, but it doesn't appear that will happen.