C&P examiner was trying to correlate my symptoms to a different diagnosis I guess?

I'm not sure how to word it, I was doing my c&p for sleep apnea and the examining doctor asked me something about when I was exposed to a toxic material I never claimed exposure to. I mentioned i never claimed I was exposed to said toxic material, nor did I make the claim that it was the nexus for my sleep apnea and she told me that she needed a date to put for exposure to it. Am I screwed for my c&p now because I told her I had no exposure to whatever it was that she was writing? Not trying to lie on my c&p, my treatment records date back to in service and I cannot find anything mentioning the material she was saying I would have been exposed to. I do have your typical CO2 and asbestos exposures just in case those come back to bite but it was something else that you would not expect, just a little freaked out now I guess. She also said my sleep study had significant variability and according to some literature that might be normal so she didnt know what to put, so I am very nervous about the claim being successful at all.