I would continue towards goal, but it might be worth asking them why/where they think you're looking a bit gaunt. I don't think 140 is an unreasonable goal for your height, and just looking at your profile pic you look great.

I know I had some similar comments as I got towards goal and it was because my face had hollowed out quite a bit - I had chipmunk cheeks when I was bigger so there was a noticeable difference in my face and I did look a bit too thin.
That being said, the fat did move back into my face (in a good way!) and filled in some of the hollows slowly over 6 months after I got to goal, and nobody has mentioned it since. I think the gaunt comments for me were a combination of seeing me at a lower weight but also having such a thin face and once people had gotten used to seeing me at a lower weight and the fat had moved back into my face a bit I looked "normal" again and not ill/gaunt.