Can an implant actually fall out?

I've been told by my "surgeon" that the implants he put in are too heavy for my skin and that the skin is stretching a lot. He said this will continue to thin out my skin and there is a very real chance that the skin will get so thin that it will split and the implant will actually fall out. I'm terrified obviously. My right breast feels very loose and rotates and at the base of my breast the implant is very visible and almost looks and feels to be bunching up - as in its just dropped there and nothing is holding it. Just wondering what my options would be to fix it and if the implant really CAN just fall out? I've included photos from when it was rotated and close ups to show how they just seem to "hang" from my body. Thank you!