I went for an hour long walk yesterday with my grandmother (Mormor). We took it fairly easy, but it was the first time I'd done any proper exercise for a while. I was fine for the first half an hour, and then I started feeling a little bit sore where bubs would be sitting. We kept going, and I wasn't in any pain, mainly just a little uncomfortable.
Then, for the rest of the day I felt sore/discomfort there when I would change positions, especially from sitting to standing. No sharp pain, it kind of felt like I had sore muscles like after doing sit ups, except lower down.

Is this normal? Not too worried, cause I wasn't in any pain and it seems to have settled down after a night's rest, but it was just a bit unexpected.