Just sounds like bub has moved into a different possy that you may not be use to.
My Dr told me with DD that just like we do, babies have tired days too so may not kick as much some days as they do others.
If you sit down and relax with a glass of really cold water, then wait a little while you should feel bub kick, even if it is only light kicking.
As always, if you get really worried, give your Dr or hossy a call.
Take care, it all sounds normal to me. These little babes keeps us on our toes and they're not even born yet!!