You don't look too thin. Then again, the shirt may be hiding a scrawny rib cage. My ribs show, hell, all my bones show, I save a fortune on X-rays, they just hold me up to a 150 watt bulb, if you're at that point, then you may appear to be unhealthy. Not any idea what your height is to go with that weight, so just placing a poundage isn't helping much.
The lighting and only one photo make it hard to say if you look unhealthy. If you are tearing your clothes when you put them on then you're probably too thin as the bones are popping through. If your rear end hurts when sitting on cushions, then you may be a tad underweight.
I am tempted to say it doesn't matter what your physical appearance seems to be with the weight, but am reminded you work in some public industry with music and the crowds probably want you looking healthy...then again, many music starts look as if they died the week before, so that might not be the case (the crowds healthy looking wanting you to be). In general friends and potato servers are best to be listened to regarding weight and healthy appearance.
This was infinitely easier when you were asking about suggestions
from the Moses faction
and telling us your reading list (History of Hod, Judaism for Everyone, Isaac Asimov...).