I'm slightly worrier the last few days because our lil boy has been a lot less active. I'm 20 weeks 3 days and I've been feeling him since about 16 weeks. he's my first. the last two weeks he's been especially active or I've just been able to feel him a lot better because he's getting bigger. however, the last three days I've barely felt him at all. I have felt him but it's not as strong and nowhere near as often. should I be worried? asking my doctor? is it normal?