Demonic possesion Help and suggestions?

I believe that i might be possesed by the devil and have been receiving Psyciatric treatment For 2 months now trying to better the situation which i have no idea about except from my friend who is a devil worshipper anyone have any exorsism practice or training cause weird things are happening to me im seeing **** and i hear voices in my head but the worst was when im blanked out and heard a persuasive cunning voice like the voice of the devil speak in latin in front of my face I couldnt see my mind went black and I felt somethere hot in front of my face Speaking in a voice that i know as latin