decreased movement

ever since I had sex Sunday night (which I bled a little bit after) baby has had decreased movement. I'll be 31 wks on Thursday, and this is my 3rd rainbow baby.

I don't remember any of my other kiddos ever having decreased movement, my next appointment is the 24th with an ultrasound.

my husband says it's because baby is running out of room, but I honestly don't feel that way