Namo Nedishthay
I read ur post ,i met with such a similar case in mumbai 4 years ago. Heres the perfect way to kill those demons, try it with so much dedication to Lord Shiva. I assure u all such powers will run out of ur mind and all ur surroundings.
Get up early in morning ,1.30 hour before sunrise,u hav to be so much pure in all things, during bath the towel u use , should always be washed and not used by anyone else, the closthes u wear after bath should not be touche by any nonpure human9who hasnt taken bath or who has eaten anything after bath).Before sitting on aasana, pls make sure to make ur aasana shudh by chanting gayatri mantra and poring some water over ur aasana. Then blow the Jyoti, a Dhoop and then start reading Amogh Shiv Kavacham. Dont forget the nyasas r must, if u dont know then ask someone how to do.Its a self recite kavach u dont need any guru to chant and perform that.All u need is ur faith, beliefe and dedication. If u still hav any problem then feel free to mail me at gopal-joshi@in.com , it will be my pleasure to teach u the right way.And one last thing , u hav to do that for 42 days, i assure u after 7 days of chanting u will see the effect starting.Some more precautions abt daily life but i will tell u via mail.
Dont worry hav faith in Lord Shiva,he is master of masters and the destroyer of all sorrows.