Donna,
IAOMT is an organization that many biological dentists are members of. It stands for International Academy of Oral Medicine and Toxicology.
There are some in the United Kingdom. Here’s the list:
https://iaomt.org/for-patients/search/region/united-kingdom/As for doctors, you will need an LLMD or LLND - Lyme literate medical doctor or natural doctor. A regular doctor is not likely to know how to diagnose or treat you for Morgellons or Lyme disease.
Be aware that the tests you asked for for Lyme and parasites can come back negative. That doesn’t mean you don’t have Lyme or parasites. The tests for both of those is not very accurate - meaning a lot of false negatives.