Multiple sightings of a triangle with still lights flying by low and at a fast rate of speed and a boomerang type of craft with no lights

I work as a paramedic in Santa Barbara County night shifts. Around 2:30 in the morning I was looking up the windshield and I saw what it look like a triangle with lights fly pretty low to the ground right over the ambulance. Right after that, I saw what it look like may be a shooting star, but I’ve seen shooting stars in the past, and this was not a shooting star. We worked our way to downtown Santa Barbara East Beach along with my partner and we were looking up in the sky, looking for anything else. When we saw what it looked like a boomerang fly silently no wind no noise right above us. Almost look like a moving shadow with no lights.
We saw it for about seven seconds before it disappeared. We called another ambulance, which is my coworker and her partner to come witness this with us when we saw the same craft looking like a boomerang multiple times maybe about 10 times about 25 to 30 minutes apart throughout the night until 0500 hrs. The interesting thing is the first sighting that I saw in Goleta with the triangle with the bright lights flying over the ambulance, I never saw that exact same one throughout the night. They all appeared as boomerangs with no lights. After seeing them multiple times downtown Santa Barbara east beach to be exact, we went back to Goleta California to finish up the night when I looked up, and I saw two more of those boomerang shaped crafts, with no lights hover above us before they disappeared. My coworker who is coming in that morning to work the day shift was able to witness two of those crafts that morning. Including myself, it was a total of five witnesses that we saw these crafts.
Some of those boomerang shadows once they pass by, there was like a shooting star type of thing right after. A bright light travel fast and disappeared.
I’ve seen UFOs when I was younger and small little lights in the day. But nothing where I can see the shape of a ship type of thing hover above us silently at a high rate of speed.
I attempted to record video open nothing with him, because there’s no lights on these boomerang type of ships that my camera would catch.