*update* 20weeks weird pain cant describe it

Ay

This is my first baby/pregnancy

when I reached 20 weeks I felt a weird pain under my belly button it feels like something burning inside my uterus not round ligament pain or period pain 🤷🏻‍♀️ Idk but it feels like burning sensation inside with heaviness

My baby is kicking since 16 weeks

Can someone relate to what I’m feeling ? Do I need to be worried ? I will mention this to my OB in a couple of days

*update*

I went to my OB as the pain was so strong , its my uterus stretching and I need to be hydrated & drink water through out the day 🙏🏻