Questions about PTSD on the disability claim and first class medicals.

Quick background: I filed my claim last summer and separated in October, still waiting for the VA to make a determination. I worked with a DAV rep to create and submit the claim, and got talked into including PTSD before I knew any better. Luckily, I consulted with a couple of AMEs before attending any PTSD-related C&P exams, but not before my husband, my best friend and I submitted personal statements about the associated trauma. I've never been diagnosed with PTSD and it appears nowhere on my record. I never attended any of the psych evals, and every time they scheduled me for one, I canceled and stated that my reason for canceling was that I was no longer pursuing PTSD on my claim.

Couple of questions: First, is there any way that the VA could potentially diagnose me with PTSD based simply off the buddy statements? I'm hoping that a diagnosis would require being evaluated by a professional since you could theoretically put anything down on paper, but also a bit worried that the VA will try to do me a "favor" here. Is it possible that they could give me a 0% rating for PTSD? If so, is that something that will need to be disclosed along with anything else that I get above a 0% rating for?