This is a funny question. It’s funny because people are so worried about protecting themselves from witchcraft that they don’t consider how often they may have been protected by witchcraft.
There are people praying for many other people’s wellbeing every day in temples of varying religions around the world. Aside of that, there are the witches; the people who don’t always trust the authorities of organized religions to do the job, or at least not fully, who bestow blessings on their relatives and friends, and back those up with offerings, real devotion, and merit.
There are so many witches and kinds of witches in the world that even though we are statistically rare, we are very well spread out, and very concerned about the wellbeing of those around us. So the chances are, whoever you are, wherever you are, if someone loves you, someone has probably done some witchcraft to keep you alive, especially during your fragile infancy.
Witchcraft may have also been involved in your conception or birth. You may owe your very existence to someone killing a chicken for a fertility deity in a forest clearing. You don’t know.
So instead of protecting yourself from witchcraft, how about asking some witches for some advice about protection from malevolent energy, ill will and such. Witches may provide you with information or take it on themselves to add you to their altar for mention during their observances of protector deities.