It’s 1365, I live in a fishing village in Southern Europe. One day, while going to retrieve a catch from the river, my foot slips and I tumble down the embankment; when I come to I find I’ve been carried home, and can no longer feel or move anything below my waist. How doomed am I?

I have a couple of earlier answers that might interest you:

In Game of Thrones, a character is paralyzed and loses the ability to walk. Was it really possibly for a medieval person to sustain this injury and survive?
How did paralyzed people get around before wheelchairs were invented?

If you've got people around willing and able to carry you home, you're in a relatively good place already. Of course, it would be even better (from a medieval point of view, before the era of disability rights and universal accomodation as an ideal) if you're Christian and have a saint looking out for you...