Has my gel implant ruptured? (Photo)

I had 400cc Natrelle gel implants fitted 3 and a half years ago.Both implants neved "dropped " and always stayed high on my chest .A few weeks ago my right implant "dropped " and filled the space between the scar and the nipple , making the breast fuller in the bottom half.It also feels softer.Should I be worried about a possible rupture?What could cause the implant to drop after so long?Otherwise I don`t have a concern about the aesthetical appearance of my breasts.

No doctor answers yet