I have the opposite feeling. I'm afraid to tell anyone. It feels like to me that people will view it as a cop out or attention seeking or that I'm just 'being dramatic' and I'm in no way saying this about anyone. It's just beliefs of my own that have been reinforced by undereducated and compassion-lacking individuals.

It would be nice to tell people. Like, hey, I'm having a hard day today, maybe be gentler in the way you talk to/about me please. Lower your expectations a little today, I'm not feeling myself. That actually sounds fantastic. It'd take off so much pressure I put on myself to keep up appearances.

Good on you for being able to speak up.