Baby Movement Question

Judy
Hi Mommies!  I'm 34 going on 35 weeks now, and I wanted to ask if it was normal to not feel your baby when you are sleeping?  When I'm awake I feel her moving during the same hours in the day (8am, 11am, 4pm, 8pm, 11pm)...but when I sleep at night...i feel NOTHING. It's scary, but could she just be sleeping at night?