Wow I had the same problem around the same time as you..You’re almost six months right? I had it during my 5th and 6th month and it was horrible, a lot of unneeded stress that’s for sure. I actually ended up going to the doctor one day because of how worried I was and here’s what he said.
If you’re really anxious lie down in a quiet place where you can relax, for one hour time each little kick and flutter you feel no matter how slight…I think it’s 10 kicks at least you should feel in an hour. Chances are girl, the more you stress out about him not moving the more you probably won’t feel him when he does. Don’t worry about it, this will pass. Wait till you start worrying about stillbirth and SIDS! Woops SORRY! Don’t go there, just relax and enjoy your pregnancy, it’ll be over wayy too quickly!