Bright light following chem.trail like a road, until wind revealed a very shinny sphere.

I was swimming in the pool.  I noticed a long chem. trail in the sky right over head.  I said to my Son,  "Another chem. trail."   As I was looking at it, I noticed a tiny light speck moving along with the trail of chemicals.  
As the wind moved, I could clearly see a very shiny bright object.  So shiny, that the reflection of the sun, made me blink.  
It came to a stop two or more times, back tracked and then headed east very slowly.  It must have came closer, because I could see clearly that it was a disk and not an aircraft.  
Excited, I asked my Son to run and get our camera.  When he came back I had lost sight of it.  
We both watched it for at least 4 minutes, before I asked for the camera.