I have a very marvelous and valuable piece of information to share with you, and the human race for curing sleep problems. It is called "sleeping earthed". You literally attach a copper wire to either a conductive bed sheet or home made device and run the wire down to a ground rod at least 1 foot deep in conductive soil. That is it. Best sleep you will have perhaps your whole life of being insulated from the earths vast and peaceful electromagnetic jacuzzi.
If you don't want to buy a bed sheet try using metallic duct tape that they use in vents and run strips across a regular sheet, attaching the strips together and connecting it with an alligator clip to a grounded wire. Have some body skin touching and you will be grounded.
EMF's wont affect you as you will literally have an aura of zero voltage potentiality surrounding you. The ultimate EMF shield is a ground. Still, it is a good idea to move all electrical devices and live wires, batteries, phones etc far away from where you sleep.
Also, entities, demons, etc are nothing more than free floating EMF fields. Ground the to the earth and they get sucked in and recycled as electrons. 100% factual and real :)