Hello Mamahawk, first let me welcome you to the site.
I am the wife of David Wheldon, one of the two medical doctors mentioned by Katman in the Regimens section and the person who started this all off on ThisisMS and was instrumental in Jim Kepner starting CPn Help. You can read my story in both places, so I won't repeat it here.
I will endeavour to go through your questions one by one:
"How do you test for cpn? Is there a definitive test? Does it always start with a chest cold? Is Antibiotic treatment indicated for someone like me.... or is it used when there is progression or worsening?"
There is no definitive test, because the serology often shows up incorrectly. I showed up only marginally positive, but I very rapidly showed that the infection was a real thing. Since David has started treating for CPn infection, he has rated quite a few people empirically mostly to good effect. The times when less effect is shown, lack of complete compliance is the main indicator. The people who find the most benefit the quickest are those who are the least effected to start off with. Unfortunately none of them posts here, but David will verify that.
"Is it possible (through dietary and lifestyle changes and added supplements and using LDN to enhance your natural fighter cells - endorphins) for your own body to mount a defense to cpn and fight it off naturally?"
I can't speak for LDN because I have no experience of it, but to a certain extent diet and lifestyle changes can play a part, in the early stages. One person in the Vanderbilt trial cleared the organism spontaneously. In the light of my experience I would say it is better to fight it on all fronts straight away rather than waiting to be more badly affected and then have a longer haul to recovery. I am vastly improved but I still have quite a way to go.
"From all I have read about MS... it is not a "disease" in and of itself... but rather a name they throw on you when your symptoms don't fit any other specific disease - even though many MS patients have VASTLY different symptoms and progression."
I would beg to differ and say that MS is disease but it hasn't been fully accepted yet. Too many people have improved just by taking the appropriate antibiotics for it to be anything else. Supplements are all part of the regime and many are similar to those recommended in both the Best Bet Diet and the Swank Diet. Both of these can help, but all to often I have read about people, especially once the disease becomes progressive, who are not helped by these. They hold progression at bay, but that is all.
But at the end of the day, you must decide for yourself. Read through this: http://www.davidwheldon.co.uk/ms-treatment.html
nd all the information on http://www.CPn Help.org
nd make up your own mind.