I heard it does decrease when you're about 34+ but you're 28 weeks. Should feel atleast 10 movements a day apparently. If you're concerned contact your MW.
your OH is rightish - when they get squished up there is less big kicks and more just like pressure movements. As long as there are movements I wouldnt panic - when are you next seeing MW or doc?
Mine still kicks but there are a lot of just general feeling sof pressure which is him moving and pushing around.
For mine, activity is definately up since a few weeks ago I'd say.