Weird pain

Briana🌸 • 17 years old. Pregnant with rainbow baby🙏💕
I was walking to the store with my SO and i felt like a heavy feeling in my uterus/abdonomen Is this normal (im 17+6 pregnant) idk if maybe the baby just felt uncomfortable or what but im a little scared?? It didnt necessarily hurt but i had to sit down for a while and it definetaly felt uncomfortable??