Is it possible to develop Post Traumatic Stress disorder after?

being not d but severly taken advantage of at age 13 and a virgin?(at the time) i have not seen a proffessional but have taken many online tests insiting i might possibly have PTSD. my score usually ranges in the 80's to 100 i have many of the symptoms and have had two panic attacks because something reminded me of that terrible night. i also have spells of irratability, anxiousness, depression, and terrible guilt. DO I HAVE POST TRAUMATIC STRESS DISORDER???