I am at 36 and 4 days from being at 37 weeks. I've noticed a routine of how my baby moves each day?

however she did not move as much as she used to since yesterday evening. My Dr gave me an ultrasound a few weeks ago and let me know that my daughter has the umbilical cord around her neck and that i will have a scheduled c-section closer to 38 weeks. But I should be consistently checking her movements. Anyhow, she did not move like she does normally as of last night and hardly today even when i drink orange juice or have a full meal. I contacted the dr and she suggest i go to the hospital to get a stress test for the baby and to check on her movements. I do feel her a little but not the same. What should i do?