Movement

A couple of weeks ago I felt my baby move all the time. But now that I'm 28 weeks I barely feel her move. When I do feel anything it's really low down between my hips, maybe once a day. So maybe I just can't feel her down there as well as I could up by my belly button? Has anybody else had this happen? Last week I didn't feel her for three days so I went to the ER and she was fine so maybe I shouldn't be worrying but I worry a lot. 😶