Lost delicate gold chain necklace with a tiny heart-shaped pendant near the park in San Angelo.

I lost a delicate gold chain necklace with a tiny heart-shaped pendant while I was walking my dog in the park near San Angelo last Saturday afternoon. I remember feeling it was a little loose, and I think it might have slipped off as I was bending down to pick up after my pet. It's very special to me, and I would appreciate any help in finding it.