I don't think that guess is right either. Hm, perhaps we should start from the beginning, and correct it as it goes along.
You appear in a random location nearby or in civilization (but out of view), probably with the sound of displaced air and a couple feet off the ground. There are numerous times you could be in (age, year, season, night or day), but you will probably be unable to identify this at beginning (assuming you know you've been time shifted). We will assume you are stark naked at this point (since common items today would give you advantages far beyond your intelligence and choices, and choosing what you get would be a pain), with the exact same health and mind you have now.
If it is cold (depending on time and location) you will die of exposure quickly or eventually, and must beg safety at the (nearest) civilized buildings (If it's warm, you will have more options). Your feet might be bleeding by the time you get there, or freezing if there's snow or frost. At which point the current time and place will matter even more, as some value hospitality, and others value slaves (in varying forms). You will probably be totally unable to understand each other, but since you are both human, you should be able to understand very basic things quickly. You should also remember, that you are quite probably taller than they are, and look different; more so the farther back you are.
I'm cold-resistant, short, and have walked 8 miles barefoot over pumice without complaint. I'm also reasonably well-versed in medieval French and English.
That said, the probability of my getting to join the ranks of the priests is fairly low, given my distinct lack of noble heritage. The most probable ending (though one I don't like contemplating) is that I'd end up considered mentally ill, a witch, or both.