I feel ya. I had surgery a month ago on my mouth and had 2 extractions. I was given Ketamine while in surgery and then because of the symptoms I was kept in the hospital for 4 days and given lidocaine and ketamine through IV. I also had to stop LDN and start hydrocodone, which I ended up being allergic to and so that was switched to Dilaudid which was helpful for 2 weeks for the pain in the site but the flare in my nerves was unbearable.
I ended up having a ketamine booster scheduled last week and this helped bring the pain down for a short time.
I am not sure how I survived those weeks but hang in there. Meditation can help calm the nervous system as well as baths with epsom salt & gentle massage. Be kind to your body and know this is temporary and eventually you will get back down to your baseline. Hope you are feeling better with each day!