I saw a hovering, silent craft over my home that no one else mentioned, even though they were there!

I was only 6 at the most. my parents were milking the cows. we had a dairy farm. 
I'm not really sure about the date or exact time of day it had to of been early because thats when you milk cows early in the morning and in the evening. 
I wasn't in school so it had to of been while school was out, or I could of been younger. I'm 45 now so some of it is sketchy. 
I was standing in our front yard to the right of the house half way between the house and the barn where they were milking, when all of a sudden it was as if everything either froze or turned into what might be called slow motion, I guess.  It was as if it were not much higher than the roof of the house and it had some kind of symbol on the side  I cant remember if it was red or yellow maybe both.  
Also it was as if my throat got tight. I didnt feel scared. I didnt seem real almost dream like would be the best way to discribe it and then it was over. I remember things starting to ,ove around me or maybe then I started to notice the things around me I'm not sure. 
Oddly though I dont recall saying anything to my parents.  I did feel tired I remember that.  I've tried to tell people on occasion before but have learned not to because they think I'm crazy!  I know I'm not. 
I know what I saw or at least whatever I thought I seen as a 6 year old child I've never forgotten.
Witness indicates that the date of the event is approximate.  PD