U might want to get that checked out. Sounds pretty serious. I had a button button piercing also but when I found out I was 8 weeks pregnant at the time I took it out immediately. Now I'm 37 weeks & what's left is a little bump where my piercing used to be. It doesn't hurt it just shows a little bump as to where it use to be. Which I'm hoping goes away when the baby arrives. Check in with your obgyn asap. Good Luck to you.
My scar is 15 yrs old and also only looked like a dot where the hole was...until my last trimester and it got stretched out and looked like a very small incision scar!! Also itched..but harmless...just stretching skin that is normally inactive!