How do you know it's witchcraft?

I'm 100% sure, because all strange events from my past are starting to connect together at her house.

What strange events?

So many my friend, sleep paralysis, having those things come at night terrifying me, dream manipulation, I think some sort of energy is transfered into you and that is how they can access you thru dreams and thoughts, this energy is very destructive aleast to me, it gives me aches and rashes, that's what I believe witchcraft is, one who wants to attain something from this craft has to give something up, sometimes its your child.