Enormous Ship passed over silently, filling entire field of vision & remember Nothing of what happened Immediately after, Until yrs later

I grew up in New York, about 45 Minutes from Manhattan. My Cousins lived across the street and I spent a lot of time there, often walking home in the dark. The direction I walked home was facing the Direction of the City and I could see the lights on the horizon. (about 60 miles SE away) I was always into Stars and Planets and looking for the Stars that didn't twinkle to spot the planets. It was on 3 occasions doing this that I spotted UFO's. But…
One night when I was about 15… Before Dark, I walked out of my cousins house and out onto the street and stopped to stare at an unusually bright "evening star". As I stared, it split in 2. I figured it was just a plane coming close so kept watching… but it then split into 3 and now another light appeared behind it. Then that one split in 2 as the first set got closer, then split to 3 also and another light appeared behind it.  It was too weird so I ran in to get my cousins to come check it out. By the time we got back out, there was a 4th set in the distance and we could make out a shape in the first set. It was a HUGE Triangular shaped ship with the outside points cut off.. So flat and not pointed like a wing. As it came closer, we were transfixed and none of us remember saying anything, just watching. It passed over us and made Not a Sound! Complete Silence! It filled our Entire field of view over us. It was at about the height of a commercial Airliner but it was HUGE!!! And it was Completely covered with Pipes underneath. As that one passed over we could see the next one coming.
And that was it….. No Idea what happened next!
About 5 - 6 years later, I was at work, talking to some co workers about Aliens & UFO's when I suddenly remembered that night. I was trying to remember what happened and why we didn't go tell my aunt and uncle - But nothing. I called one cousin and asked him if he remembered it and he said "Yeah…. Wasn't that a dream I told you about?" and I said no and suggested we get his sister on the phone. When we asked her about it she said "Wasn't that a dream I told you about?". None of us know what happened.
Then, about 10 years ago, I was watching something about aliens and they mentioned some organization, so the following day I looked them up and sent a message. I got a call from a woman that asked me a few more questions about that night and asked if I had ever heard of the Hudson Valley sightings and that I should look them up. I did and they were all similar to my story and all in a line the ships had passed over us!
I'll always wonder what happened that night.