31 weeks - no movement

Corina • Young momma to be - 18 Due November 1st with a little boy!
So tonight, little man is being very inactive. Usually he has a huge energetic spurt around 730 - 8 pm, and tonight he hasn't. I've felt maybe one or two small movements in the past few hours. I don't want to call my midwife because it's probably nothing and I don't want to be a burden on them. Also, I have an anterior placenta, but I've never experienced a lack of movement like this since around 23 weeks.