What if you really were an authentic time traveler that had not yet traveled?
If you had indeed found such evidence, up to the point where you were about to travel back, how could you be sure it was you and not someone else or another you from another world-line?
If you had discovered a large body of such evidence in form of cryptic and ambiguous text, would you be able to tell for sure whether it was you, someone pretending to be you, or someone trying to send you a message?
If no one told you or were to deprive you of the truth or assistance, how would you obtain proper confirmation?
If it were in the context of something enormously influential for billions of people, how could you come out into the open without causing a great deal of controversy or strife?
What would be the psychological effect of such a set of unique circumstances?
How would anyone cope with such a big challenge with no assistance or definitive frame of reference whatsoever?