Decreased fetal movement at 22w

I am 22w2d today. I have been feeling lots of fetal movement since 18 weeks. Tese past 2 days it is very limited. I'm still feeling it slightly but not as often as I did. I am also SEVERELY constipated and wondering if this has anything to do with it. I've been taking miralax for 6 days, stool softeners twice a day and even had myself a big glass of prune juice (yuck).