It flew right in front of me and disappeared

I work 3rd shift and i stay up most nights when I'm off work. I was smoking a cigarette setting in my car with my window down when I looked up from my phone and saw a craft flying silently about 20 to 30 feet off ground and it was changing like molten metal and disappeared. I haven't reported it because I believed it had to be our governments because of the shape and how low it was flying. I still believe it was made on earth cause of the shape, I now think it could be another country's cause it was flying low under the radar. And that has started to bother me.