Photo Stream

65stumped wrote:

How do I know if I am using Photo Stream on my phone.

Go to the General/iCloud/Photos settings pane and see if My Photo Stream is turned on or off.

If you don't have any photos in the My Photo Stream album (or don't have that album) on any of yourApple devices in the location shown in Information about the My Photo Stream shutdown - Apple Support you won't lose any photos.