Troy, I think one of the toughest things about combat PTSD is the constant irritation that it brings with it. There is a restlessness and a underlying desire to get away from the rest of society that makes having to take part in group anythings, being asked questions and handle civilians who don't know crap that can make sitting and trying to explain what can't be explained unbearable.
My grandfather had PTSD untreated from WWI and to give him credit, handled it alright on his own....for the most part. The dreams never stopped. One of my earliest memories is of him screaming at night. He would have seizurelike responses to cars backfiring, ice in ice machines falling into the bin, that sort of thing. It sould be years between triggering events, sometimes it would go dormant for a very long time.
I don't think it should make who ever talks to you suspicious that you are just coming in for help now; I see people coming in for their first PTSD evaluations decades after the trauma. One of the biggest things that will make it difficult to seek help is just the difficulty trusting anyone that you need in order to be able to accept help.
Hang in there. It's just a word of encouragement from someone who only knows second hand. Huggs.