The general rule of thumb is to shoot at a shutter speed that is the inverse of your focal length. So, if you're at 55mm, then shoot at 1/55th of a second or higher (which means 1/60th since that's what the camera goes to).
If you were at 1.3 seconds exp, and 5.6 was the widest your aperature could go at that length, then to go up to 1/60th would have been about 5 times faster:
1 second > 1/2 > 1/4 > 1/16 > 1/32 > 1/64.
Since you couldn't go wider on ap, your only option is ISO. So, 200 > 400 > 800 > 1600 > 3200 > 6400. Which can be a bit noisy, but getting the image is most important. Maybe 3200 and shoot a bit dark, or hold your breath with a slower shutter.