Stomach suddenly flabby and grab-able

Sade • 👰🏾 to a 🚒firefighter &🚑 EMT. We have a toddler👧🏾 & another baby girl enroute 👶🏾! 3⃣💍1⃣💍1⃣3⃣
I'm 39.5 & today the pressure has let up but my stomach is feeling loose and grab -able esp from the bottom. I feel great tbh and lightweight but 👀 Anybody know what's up with that ?