Baby moving less

Missy
Hi all. I'm 24 weeks and 3 days, and in the past two days I have noticed my little guy moving less. He is still kicking from time to time, but much less active than he has been the last few weeks. 
Has anyone else experienced this? I don't want to overreact and contact my midwife if it's nothing, but I am a little worried. 
Thanks!