Flashing Objects in Sky Middle of Day

I was driving my daughter home at approx 12:15 pm and saw what I thought were pigeons moving erratically in the sky. Upon focusing closer, I could see they were way too far up to be birds. I pulled over to observe- they were flashing and moving in the sky, about 15-20 of them. They did not look like drones. I called my husband who was at our home about three minutes away- he went outside and saw them as well and was confused as to what they might be. I first contacted a local news station who replied to my submission but that was all I heard from them. Then I posted to instagram to see if anyone could suggest what they were- people seemed just as confused as me. I posted to the Next Door app to see if anyone else saw it, not one person. I then called the Riverside Sheriff to see if they had info or anyone had reported it and they had no information. I have no explanation for what these are at this point and would be so grateful if you find out they are not UFO’s that you let me know as I am creeped out!!