I have been liked a caged animal since Saturday when I had this crown preparation on the upper right molar.  I was fine before.  Now I have mouth ulcers for the first time in my life (it may have been from my scratching the gum by pulling back and looking) and the vein/gum immediately above this so called preparation – with its alarming gap – is swollen and I’m finding it impossible to keep clean.  Can anyone help me.  Try as I continually may.  I’ve called but am told I should just be patient and everything will be fine.  I’m finding that hard to believe.  It is now going into the sixth day …. and the swelling continues.  I am fearful.  Sincerely so.