Kell I went through the same doubts at just about the same timeframe....6 mos on LDN. I expected things to keep improving and expected no setbacks. I was very discouraged, when I still had bouts of fatigue and other sx.
I stopped LDN for a week or so and just got worse. When I went back on it, after a lot of encouragement from peers, I felt better. I discovered, over the years, that I will still have pseudo exacerbations of certain symptoms, usually caused by illness infection or the awful weather (hot - cold - humid?)
I am not disapointed in what LDN has done for me and my MS as a whole. It has kept me stable, with a little falter once in awhile, for the last 6 yrs. I feel better today than I did last year, at this time and that is good.
The choice is yours, whether you go back to Beta. Either way, I would still stay on the LDN. I know someone who did well on Both, for a long time.
Whatever you decide, we're with Ya..