Nose piercing

I didn’t go to a professional for my piercing; I chose to let my cousin do it instead. I got it pierced in 2022 (the first pic shows when I got it done). I haven’t changed the jewelry since then, and because I’m really sensitive, it hurts a lot if I try to take it out or move it. It’s been months since I cleaned it, and now I’ve noticed some pus. Is this normal? What should I do?