Woke up with a smaller baby bump

Regan • 9 year old angel baby 👼🏽 born at 23 weeks. Mommy to a 7 year old princess 👑 👩🏾‍🦱 and a 16 month old prince 👑 👶🏽! Pregnant with baby #4 🤰🏽☺️

So I’m 29 weeks pregnant and a couple of days ago I woke up with a smaller softer belly. My belly has only gotten bigger and harder throughout my whole pregnancy. I’m nervous that I have a slow leak of amniotic fluid. What’s making me nervous is my baby’s movements are a lot stronger like they’re less cushioned. Also, when he moves it hurts now, like sharp pains. There is also a lot of pressure and sharp pains in my pelvic area and vagina now. It’s probably nothing and he might have just moved positions but I don’t understand why my belly would be smaller and less firm.