AIBU to think this was mildly weird?

[HoarseMackerel]

I went shopping and lunching with my daughter aged 18 today. Smallish town but not our home town. A few miles away.
We went and had a coffee straight away and sat chatting.
I made brief eye contact with a man as we stood up to leave. No concern really.
We continued shopping and then had lunch elsewhere. The same man was sitting behind us. He was watching us as far as I can tell and looked a bit furtive but hard to tell.
As I stood up, I said to my daughter 'look at that man behind us and see if you recognise him or had seen him before'
When we were far enough away, she said she wasn't exactly sure which man but hadn't seen anyone familiar.
Finally, we went to a large book store, spent ages browsing downstairs and then went upstairs.
The upstairs layout is more like smaller rooms with sections.
We were in a corner looking at crafts and gardening. As I turned around, I came face to face with the man. He looked shocked and sort of stopped in his tracks as if he didn't know the store and didn't realise he'd be right next to us as he turned the corner. I turned to my daughter, turned back and he was gone.
I'm not sure what to think!
We then went home which was a bus ride, then to the car and then home.
No sign of him after.
At the worst I'm thinking he stalks in that town as a weird hobby but have said to my daughter that if she sees him again, then obviously my level of concern would be raised.
I know it doesn't sound like much but gut feelings and all that!

I think you're over reacting. Sounds like you were the one being weird. It's not that odd to bump into someone a few times in a small set of shops.

Might be weird, might not. I’d be rattled too. Keep your eyes peeled. Probably fine but it’s ok to be watchful.

That would make me feel a bit uneasy too. I'm sure it's nothing, but perhaps keep your wits about you for the next few days. And tell your DD to do the same.

I just said that I didn't think it was too much to worry about but yes, if anything else were to happen I'd be concerned.
When I say smallish town, I meant proper high street with chains but not London or Manchester size.
My gut instinct was that he was following us but only on that day. Not that he'd followed us from our home town.

Complete over reaction.

To clarify.
I haven't karate chopped him to the ground or called 999.

I'd err on the side of coincidence atm, he seemed shocked to see you in the book shop, if he had been following you he would have known you were in there

He was probably wondering where he knows you from at lunch and maybe hadn't clicked it was you in the coffee shop.

Maybe he is someone who lots of people know??...GP/teacher/optician and gets this a lot.

Further sightings in other places might make me uneasy, but not so much for just today's events.