Movement

Brittany • Hello! I`m 26yrs old married for 5 yrs we have a 5yr old daughter and 3yr old son .. We are trying for our 3rd child
Getting really worried .. I'm almost 37 weeks and have always felt my baby move kick or stretch.. Past 3 days the movement has been decreasing ... Yesterday I felt her maybe a total of 10times all day.. Today I have felt nothing so far I have an ultrasound and appt today... Should I be worried