Less movement at 28 weeks

Kim
The past 3 days I have noticed a decrease in the baby's movements.  Her kicks are much softer and less frequent.  Do you think she is in a weird position?  Should I be worried?  I tried drinking orange juice and laying on my left side.  When I do feel her move, it's softer than it was last week and not nearly as often.  She used to kick and move like crazy...