I went to a satinic high mass last week as a joke but now i think a demon is in me how do i exercise it away?

ever since i went i have had deomonic dreams, very loud ringing in my ears, lightts flashing, hear voices, and gas. aslo thinking about kiling myself - i cant make this idea go away!!!1 yes i know i was stupid to go, i thougt it was just a joke but obviusly it wasnnot and now i am scarred and think i am loosing my... show more ever since i went i have had deomonic dreams, very loud ringing in my ears, lightts flashing, hear voices, and gas. aslo thinking about kiling myself - i cant make this idea go away!!!1 yes i know i was stupid to go, i thougt it was just a joke but obviusly it wasnnot and now i am scarred and think i am loosing my mind!!! help me to exericse the demons, i am not catholic so i dont know if i am allowed to see a preist, would just chanting the bible all nite make the demon go away? also would like to bath in holy water but i don't know where to buy it. i donot want to be posesed by the devil anylonger!!!!!!
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