I had an improper fit with my implant and eventually needed a revision. With an uncemented hip, the fit has to be perfect for the bone to grow in. The socket is a porous thing and the bone grows into it. Bone cannot jump over to something, therefore the fit has to be perfect! How old you are or how much time it is between surgery and revision is not really the full story.
I knew something was wrong WAY before my surgeon would admit anything, and in fact, he never did. I had to do my own research, lean on the bonesmart admin and moderators, go to an osteopath and then another surgeon in a neighboring state for them to run a test and figure things out, and pretty darn quickly too.
So you see yes, it was a long time but not for any good reason. So save yourself some time and get a 2nd opinion whether you like your surgeon or not and whether you see him or not again. There is absolutely nothing wrong with getting a 2nd opinion. This is you body.
I ended up waiting too long and trusting my surgeon and ended up with nerve damage. Now I am not saying that is what is going to happen to you, but why wait till something does. I don't have the answers for you or pretend to know what is wrong, but if you are not getting answers that feel adequate, then look somewhere else. There is a nuclear medicine test that can help determine whether it is loose or not. Obviously I have strong feelings about this LOL, so sorry if I overdid it, but I like to let people learn from my mistakes. Trust your gut, it is usually right! -Cathy