2 flashing circles flying moving without sound

I was waking my dog late in the evening and I was watching the sky because it was a clear night.
I saw a satellite, I saw three airplanes.
At some point, I saw a white light blinking above me, around 150 meters from the ground. I thought it was an airplane. But I kept looking at it, and then I realised that it was a circle. Next to it was another circle and they blinked continuously but not synchronous in a circle...
So because those 2 white circles were moving in the same speed, I thought it must be ine enormous flying object.
I did not see a shape, I would rather say that there was a aura or something around it, so you could have guessed the size.
It did not make ANY noise.
Of course I did not have my phone with me, so when the object was out of my sight, I ran home like a crazy person and grabbed my phone to call my boyfriend and my mom. Nobody answered, so I tried to follow the flying object but I couldn't find it anymore. Instead, I saw a white light flash in the distance like theres a thunderstorm coming up, even though the whole evening/ night there was no storm. Maybe coincidence, maybe not I really don't know.
I made a foto later of the place in the sky where I saw it and drew MYSELF the size of the circles on the foto via my phone.
Is there such a flying object known? Or is it really unexplainable?
I have never seen anything like this, and I do believe in extraterrestrial beings...
PS.: 2 days before this, I saw something else, please contact me if you are interested. It was not really an flying object, more like geometric bright green objects hanging in the sky above our garden (very low, maybe 3 meters above the ground) and disappearing after 2 seconds) My boyfriend saw it as well... we were looking outside from our living room.