@sunnygreenwood Thank you Anne and thank you for identifying the flower. I didn't know this was a phlox. I have phlox in my back yard that is a ground cover but didn't relate it to this flower. The flowers do look similar.
@laynesgram Thank you Laynalynn. Someone else thought it was phlox, too. I have a phlox ground cover in my yard and these flowers do look like ones on my ground cover.
@denisedaly Thank you Denise. A couple of other people have identified it is phlox, too. I have a ground cover phlox but didn't relate it to this flower.