Baby Monitor High Def

Im 24 weeks, and Ive had a very active baby. I started feeling her move A LOT around 18 weeks. Since then she has been moving a lot early in the morning and late in the afternoon. So, these are the times I expect her to move. The past couple of days I havent felt as many movements. I could feel her every now and again...but def not as much as before. It scared me so Ive started using my baby monitor to listen for her heart rate. Her heartrate seems normal at about 150 bpm. So, is she just growing and running of room or should I call my doctor. Ive also been very active the past couple of days more that usual b/c were moving into our new house. Maybe im just not realizing she is moving b/c Im so busy? I also felt most of her movements very low, which was weird to me b/c Ive always felt her high near my belly button?? Please HELP! Im going crazy!