Standing still then disappearing. Then sighted again moving very quickly.

I was driving on 83 South with my girlfriend yesterday during the day when there was completely blue skies. I look up to admire the nice day and blue sky when I noticed a plane in the sky because of its contrail. To the right of the planes path was a very bright small circle that looked like a star, but it was the middle of a bright sunny day so I knew it was not a star. The difference between the plane and its contrail and this object was very noticeable. I pointed it out to my girlfriend and we both looked at it for a couple seconds then went around a bend with the tree line blocking our view for a few seconds, and when we came around the bend it was gone. Just about 1 minute later further down 83 and now into Baltimore City…I saw a less bright and dull white circle moving extremely fast in the other direction then completely lost view of it. It was moving with no contrail and was also faster than any flying object I’ve ever seen. There was no sound either.