How soon is to soon

Angelica • Working On ME 💪 ✨ Oscar Alexander 👦🏻 Yliana Daleyza 🎀 Adrian Rèy 💙🌈

How to soon is it for your stomach to drop during pregnancy , I fell my stomach has dropped and I've become unable and getting pains in my pelvis but I'm only 26w

Hopefully this makes sense