I am a bit freaked out and looking for advice. I was off yesterday but my partner got delayed in work. He rang me and asked if I would mind to pick up the steps. I do this very rarely and only when he isn't available to do so, he usually picks them up on his days after school. I have maybe picked them up half a dozen times in three years and been inside the school once.
He rang the school to let them know I would be collecting but as I like half an hour away, I would be there between 230 and 245 pm and to just have the children wait at the gate.
Arrived up at the school at 235 and met ss at the gate. Waited and waited but no sign of sd. I ask ss if his sister class has come out and he says yes. All the time I can see through the doors of the school a man in a suit watching me and ss.
Eventually it gets to 250 pm - myself and ss go into school to look for sd. We walk in pasts man in suit and turn down corridor. Man in suit starts to follow behind me. We get down two classrooms when I see sd sitting on a black chair reading a book. The man is standing a couple of feet away, full on watching us, like he is watching for my reaction, for me to say something- he is watching for something, I don't know. I say to sd lets go, she hops up and off we go. The man in suit walks ahead of us back out- he says bye to the children by name but nothing to me. We get in car and go home.
On asking ss tells me that the man is the principal of the school.

Guys, this was creepy as f**k. You know when you go out at night and you get the sensation of being followed or something - yeh I had that sensation the whole time. This man was watching me outside the school and then followed me and watched my interaction with sd. I feel like someone- either sd or BM is talking about me behind my back and this man was trying to get some sort of reaction out of me.
Maybe I am crazy paranoid but o know how I feel and that is creeped out.

I have told my partner about it but he doesn't understand the feeling of being watched and freaked out that I got. Am wondering what I should do? I sat on this for 24 hours and am still as uncomfy as I was yesterday - part of my brain still thinking about it, my stomach is dropping writing this, etc

I think someone been talking in his ear and it isn't us