Someone please give me a scientific explanation or spiritual one?

Okay, I do not believe in ghost or anything like that because I have never seen such a thing in my entire life. Stuff like ghost or unexplainable activity never appealed to my senses. However, recently I had been going through typical life situations that really made me seek comfort from the Lord. I literally prayed more over the last month than in my entire life. I prayed and prayed and now I am experiencing something that I have never experienced and I am almost trying to find a scientific explanation to explain it away. Last week, during the night, for about three nights straight, I would see what people describe as an orb. It would be one Bright circle orb and at first it would kind of sit there and then it would travel towards me and disappear. It was peaceful and not scary but I don't get the point of it all? Well, there was no light or anything for something to reflect off of, but I still just said "maybe a car passed bye." In the past, cars never made small bright circles move across my room in such a fast and interesting way, but that was the best thing I could think of.LOL. Well, to be certain it was not passing cars, I closed off the windows even more and it stopped until today! I was sitting up watching t.v. this time during the middle of the day, and the orb came and boy could it move fast. I was like "okay, now I know this is not a reflection and whatever it was is very peaceful- and it seems almost playful. What in the world is it and what does it want? My religion does not discuss orbs so it is kind of taboo to even address it because of the stigma but I welcome feedback. : ) Thank you!