Baby movement

I’m 37 weeks and my baby has been very active my whole pregnancy but hasn’t been so active these last couple of days! Is that a bad thing? My dr ask me all the time if she moves and my response is yes because she’s like a fish in there. Should I be worried or is it normal because she’s pretty tight? I’m concerned because I’ve lost a baby at 32 weeks and I just want to be sure everything is fine