Yes, 17, this is quite a traumatic event and can very well cause PTSD. You can read more about this disorder by going up top to Disorders and clicking on that. The flashbacks and distress need to be lasting a month or more, which you do have. PLEASE contact your MD for a referral for psychotherapy. The sooner you begin processing what happened, the less the event will bother you... don't put this off as it doesn't heal itself and becomes complicated. (((hugs))))