Strange T shaped scar from facial mole excision (Photo)

I had a mole on my chin excised 6 weeks ago and the vertical incision is healing fine. However I have a secondary horizontal line that makes the scar area look T shaped. It is very upsetting because it makes the whole area look so much worse and I have no idea how it happened or if the second line will go away. I wonder if the horizontal line is from the ends of the stitches, or the actual stitch itself that was under the skin? Please advise. Thank you.