PTSD is when you experience something traumatic and you're brain more or less gets stuck on it...Not so sure you're first job or first time trying to talk to a girl involved a life threatening occurrence that freaked you out, which is sort of a pre-requisite for PTSD.

To me it sounds more like maybe anxiety and rumination issues, which I also sort of have at times...like the mind that will not mellow out I think PTSD can make that worse but that in itself isn't.