Normal for it to sting?

Just Me • Have a 4 year old daughter and a Newborn GLOW baby girl born 22/04/ in love 💕
So I'm almost 34 weeks with my #2 baby/daughter, and my belly button is stinging/hurting and looks like it's turning from an innie to an outie!! Is this normal for is to hurt/sting/feel uncomfy? It never happened with my first at all and I do have scars there from a belly peircing and also from surgery I had via belly button.