I am sure I've had three fillings, one in 2005, one in 2010 and one in 2013. Whilst randomly inspecting my mouth the other day, as you do, I could only see two?! I am so ire I've got three but couldn't find the third. Sure they were all grey fillings as well so easy to spot. Can't see anything odd about any other teeth nothing hurts or feels weird and never felt anything fall out. Am I going mad?!