Taylor was assaulted (resulting in significant injuries), an…

Taylor was assaulted (resulting in significant injuries), and robbed while at an ATM machine.  The security video shows the perpetrator completely dressed in black with a full face mask making identification extremely difficult.  Among Taylor’s concerns is that this person now has his wallet with driver’s license and address. Taylor has recovered from the injuries.  However, he never had an issue with his stomach until now.  He is also  hypervigilant, cannot stop thinking about the incident, startles easily, has problems concentrating, and has difficulty sleeping.  What primary diagnosis best fits this example?