Satellites? Highly reflective space junk? Maybe even another airliner... JFK is in the area, so is it possible the one you saw was flying lower than usual because it was coming into or out of the airport?
We live between flight paths for JFK and LGA. Trans-Atlantic traffic from other cities transits here at higher altitudes. Frequently we just see a speck and contrails. It is the rare hour when there is no visible air traffic. The jet that flew beneath the objects was way too high to be in a landing or take off path.