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!
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.