Heard a high pitched ringing and turned around to see a shiny, silver space craft.

Was out for a walk after a long day. Started hearing an extremely high pitched and continuous sound. Thought it might be from my migraine, but it wouldn't go away, and seemed like it was coming from above/behind me. I finally turned around after 4/5 minutes and saw a silver spacecraft, big enough to recognise as a spaceship of some sort, but still far away. It had this strange silvery haze around it as well, that was almost beautiful. I was frozen there for a few minutes, and unfortunately didn't think to get video evidence. I was still confused and kind of scared, so decided to just go home and get some sleep. Sorry if it seems like a stupid thing to do, but I was very tired and wasn't 100% that I was seeing what I thought I was. (Though now I am sure of what I saw.) About to turn in early for the night, but wanted to get this off my chest first. Thank you for listening. If I see the spacecraft again, I will submit another report.