Hey Nathan, I have been dealing with PTSD for the same amount of time 12 years. I too have a sense of humor that is kind of strange, I believe that in my case I laugh at the bad things to cope with them in a way.
I don't talk about my condition to many people as they do not and cannot understand the way I think. I have made comments that were sort of off the cuff in regular conversation so I do understand your problem. The questions begin to stack up in the minds of others and befor you know it all hells breaking loose for nothing.
I was talking to a guy on my street, the subject of civil war breaking out in the US became the topic. He told me that he had some food stached along with a few other things. My comment was that I had already desided that if things went bad I was going to eat the guy across the street from my house. He looked at me funny and said what, I said have you noticed his chicken leggs and started to laugh. Well lets just say I heard about it later, I still think it was funny and he does have chicken leggs.
I wish you luck, remember be careful and welcome to the forum, Legend