Hi there Raymond,
I am so terribly sorry to hear how difficult things have been for you. You have certainly been through a great deal and continue to contend with so much.
I know you mention working with many doctors and a family practitioner, but have you by chance considered seeing a true headache/migraine specialist? Here is some information on possibly making the decision to do so as well as how to find one.
https://migraine.com/blog/making-decision-see-headache-specialist/
https://migraine.com/blog/really-find-headache-specialist/
In regards to receiving assistance in getting a service dog, unfortunately we do not have much to share on that. By only just conducting a quick search online, here was one organization that came up http://www.domesti-pups.org/service-pups.html. We have no information related to their quality of service and obviously no affiliation with them, but maybe by contacting them they may be able to put you in touch with or recommend other organizations.
I hope some of this information helps you out. I truly wish you all the best and please always feel free to reach out for support.
Warmly,
Joanna (Migraine.com Team)