Another survival scenario which I respectfully think to be more probable than being catapulted to 1000 AD.

You have been serving somwhere in Asia or Africa in humanitarian or whatever peaceful civilian cause. The area has seen political and social tensions that escalated into armed conflicts. Suddenly, a natural or man-made catastophe takes place ( huge enemy attack, flood , massive earthquake, whatever) and you find yourself ALONE, without papers or anything other than your clothes and minimum stuff.

The area is inhabited by sane and insane people, good and bad. Unfortunately you didnt have enough time to learn how to tell who is what.

You have no passport or any other papers. Many of those who knew what you were really doing (good deeds) are dead or long gone. How do you move from there ?