I had my original implants in 2014 too. I noticed one of them felt less full, then started to notice the underneath felt different to the other side too. I booked a breast implant ultrasound where it was confirmed one had ruptured, and they could see the silicone leaking into the lymph nodes in my armpits. 3 weeks later I had them out & new ones put in.
It’s really difficult I think to be 100% sure so book an ultrasound and go from there.
Silver lining – new ones are slightly bigger (went from 350 to 400), and better shape (went from mud to high profile) dual plane. Recovery was milesssss easier the 2nd time round.
Hope that’s somewhat helpful x