Does this mean anything?

My tummy has been hard all day.. Not on and off like I would expect BH..

Like I got up with it, worked all day, am now chilling.. All day hard tummy.

Not rock hard but more like drumskin tight.

It's not very uncomfortable, baby is moving just thesame as other days.. Maybe even a bit more..

I just thought it was a bit weird and decided to ask you guys.

I'll be 37 weeks tomorrow. Though last week aparantly my due date was estimated a week earlier, but when I googled it google said that was normal.