PTSD;

Not sure if this is controversy but, I'm currently going threw Therapy, going on my third appointment. So just starting but my SW thinks I have PTSD. I know there's something wrong with me. My question is, is there anyone else that has PTSD? How do I open up at Therapy? So far I've been in good moods going in every two weeks but in-between I have triggers that set me off. Either mad, sad, depressed, lost, etc... Sometimes all of the above within hours. I can't stand it, it's driving me nuts, making my anxiety and depression sky rocket! Please any advice?