help?!

I'm currently 27 weeks and 3 days pregnant, I don't feel my little girl move like how she used to . It's been like 2 or 3 days without movement. Maybe just a kick here and there through out the day. She used to move a lot especially after a meal. I have a fetal Doppler at home I checked her heartbeat twice and it's there . I've just been feeling like something is wrong or something's not right. I have a doctors appointment on Tuesday also they usually just check the heartbeat as well .