Hi Sandra. It's unlikely anyone can answer your question unless you upload a photo of the actual plant. Your photo of the image on your phone screen is far too small.

And it's upside down.

possibly lemon balm as that is just coming into flower in my garden.

Can't see the height or the leaves. Lemon balm grows about foot tall and has leaves with slightly serrated edges.

Sandra you need to download the photo on your phone to your computer and then send to us... not sure whether it is, or isn't, lemon balm. However, taking of photo of an image in your phone isn't good enough for any i.d.