At 28 weeks u should feel her less..I was also worried.. but if u eat a chocolate and drink a sugary drink and lie down on Ur left side u should feel her no matter what time of the day..if u are busy u won't feel her as much but the minutes u relax u should feel her again.
^^^^ I felt the same wa y I went in and everything was fine but. U r mom and u kno ur baby. And u should be sure
You should definitely see your doctor asap!