I believe that a combination of stressors could contribute to PTSD. In your case this might be a less-than-healthy childhood, internship, leaving college [changing worlds essentially] and the loss of an intimate relationship could combine to create the symptoms of PTSD. Congratulations on completing college and for coming so far as you have. I am familiar with the symptoms you describe and hope you will continue learnng and seeking any treatment which might be helpful for you. You will find good support here. billieJ