Is my palatal expander causing me to have nerve damage as I now have pain when I bite whereas I didn't before?

palatal expanders work on kids because the upper jaw is really two bones that are connected by a suture down the middle.  Putting a force on the opposite sides separates the bones and new bone fills in.  At a certain age (sometime in the teens) the bones become permanently fused...the only expansion that happens after this time is just moving teeth  through the bone...I would get a second opinion asap,