But how can you step down as MS?
I can't tell you what to do, but here's what happened to me:
I was an elder, and had a MAJOR emotional breakdown. Started seeing all sorts of doctors. Everyone in the cong knew there was something really wrong with me. The elders were actually quite understanding and I stayed on as an elder for about a year.
After a year, I had really made no progress mentally. I was still falling apart constantly (I also had no idea yet that I was in a cult). I went to the COBE (or whatever they were called at that point) and tearfully told him I couldn't go on being an elder and that at times I truly felt that there was no god.
And that was it. Next CO visit I was deleted. Didn't even have to say anything to the CO.
I guess what I'm saying is that even if you have doubts as to god's existence, they will not DF you, and they will be perfectly willing to have you "step down." However, if you express doubts as to the BORG, you're out.