Just Recently my Upper Lip Began Covering my Upper Teeth Almost Completely. What to Do?

36 yrs old, braces 12+ years no breaks. Recent months my orthodontist began closing a large space, I asked him if the lips drooping over my top teeth is due to closing of the space, he said no because he had not moved my teeth up nor down in a long time. Also, side teeth are less visible. I have had temp filler hylauralic acid injected in my lips many times in the past, but nothing since 2008 because for some reason, they maintained their fullness. But why? Is this related to my recent problem? Please see update posted here.