In Plain Sight

I was talking to a work colleague about something that isn't my concern but could be (for reasons) and they said "I'm not worried about it" and I jokingly said "well I am!" or something to that effect like "well I'll worry for you then" or "I'll worry for both of us" like some sort of lighthearted joke suggesting I would take care of the thing (that impacted them but could also impact me.)

They stopped what they were doing and turned to me and said "I know I barely know you but I have the sense that that is something you... have to deal with."

I didn't know what to say.  I work as hard as possible to appear as a happy, normal, non worried person at work.  I haven't told anyone about my anxiety or anything.  We have a stressful job.  At least I think it is or can be.  I was rather shocked that this person had noticed what I've felt like I've tried hard to hide.

They then went on to say something along the lines of "I wish you could realize you are all you need to be" and I appreciate the sentiment and kindness I'm still just rolling around the idea in my head that my attempts to appear calm or normal or cool and collected are not.... not what's seen.

I kind of don't know what to do.  Not that there's anything to do but it's like, I thought I was keeping a secret and it turns out it might not be a secret at all?  Do I work too hard?  Care too much about details others don't?  What's given this person that impression?  Does it matter?

I just thought I was doing a good job at hiding my worry/stress/anxiety and at least one person seems to have seen through my "acting" attempts.

Hidden in plain sight I suppose.

Or maybe they're just extra sensitive?  Or maybe I'm overthinking and they mentioned it because of what I said, I don't know.  And I didn't want to get into it.  But yeah, I think it's thrown me a lot.

Sigh.