You're probably just more busy so you don't notice as often. When in doubt, drink something cold and do a kick count.
When I'm super active on my feet walking around I don'talways feel her move, but there are times I do feel her move to. I'd say call your doc if your really concerned bc everyone's baby is different. Some are more active then others, some have quieter periods, but your schedule change could have a lot to do with it to.