Decreased baby movement 😦

My daughter is very active. All the time active!!! When she moves she moves and I feel it. it can be very uncomfortable. But I'm getting worried tge past 2 days the movement has been very vague. Sometimes I'm not sure if it's her or if it's my tummy rumbling..... I rather her be moving and me be uncomfortable then not being able to tell the difference between her and my tummy... I'm not sure if I should be concerned or not my mom said she's getting bigger so the movement decreases but from one day to the other. I'm just worried and need some advice please