Confused

I’m 20w2d and this morning I woke up and the left side of my stomach had a pain for like 3 seconds (if that) and then later on in the day it moved to the space below my belly button. Is this normal? Could it be the baby kicking or moving? I’m not sure I’ve felt the baby kick or move yet so I’m thinking this could be it and i just “think” it’s a small pain for like three seconds because I don’t really “know”