I had 8 teeth crown lengthened 6 mo ago and the discomfort-pain-sensitivity has not subsided! The periodontist also did a frenectomy and I have pursued possibilities of root damage with a specialist but no damage there. I am waiting on a appt with a neurologist because I am so tired of this pain and discomfort. I did this to fill gaps and to make the teeth proportionate. What went wrong?

Nothing wrong. The total time taken to perform a crown lengthening varies. Close teeth may need to have tissue removed.