Sorry, I must have been walking around with my head in the clouds because I have only just noticed this. Barbara has already answered most of your questions, but I will add a little more.
As far as disability goes, I have improved, I would estimate, from about 7 on the scale to about 2, in the two plus years since I started. I am not perfect yet, but am still improving, if slightly slower than at first.
As Barbara said, there are many people taking both a CRAB and the antibiotics, following either the Vanderbilt protocol or my husbands, which are very similar. I have never used a CRAB because in the UK that aren't prescribed for progressive disease, but they can be used in conjunction, should you wish. Also statins, which several people use, and LDN. I haven't taken any of these. However, I must reiterate that doxycycline alone will be of no help and needs to be taken for at least a year in conjunction with zithromax or something similar, with pulses of either flagyl or tinidazole. You had better print out one of the protocols to show your doctor.
At the end of the day it doesn't really matter if your husbands illness is caused by Lyme or CPn, because the treatment is the same. Also both pathogens are good at playing hide and seek: I was tested for both and showed negative for Lyme and nearly negative for CPn. Many doctors would not have treated me.