Fudge, where do you reside? Do they approach Astrally, or in person? Are they casting magic to keep you asleep, or to affect your dreams? Do you know these witches personally? If so, distance thyself from them, and seek not the black. Unless, or course, you don't mind the razor-blade marks. Either way, you know too much. You will have to embrace religion I'm afraid. It is the only source of freedom. P.s.: Are you certain they aren't vampires? Vampires have been known to use razorblades to extract small amounts of blood without infecting their victims.