Strange thing is, I can't find any photos of Glechoma hederacea showing shiny leaves. Young plants might have but mature ones seem not to have, we really need to see a close up of flowers.
http://www.ppws.vt.edu/scott/w...
The flowers on Lamium amplexicaule look bigger and the habit is a little different, still we need a close up of flowers to say anything for sure.
http://luirig.altervista.org/s...