I dont understand this? please help? 10pts?

I have a history of not bealiving in god and being in black magic and not bealiving in him so tonight was was depressed and suicidal, and I prayed to him for help, I felt him, I felt happy and at peace and forgot the bad stuff and felt very happy now I feel like the demons are mad at me for turning on them and as soon as I told god good night I got really cold and had to open my light I feel like I'm being watched and I'm haulsinating I keeps seeing things move in the corner of my eye, hearing things move, just this great fear I feel is strong I'm really scared I wanna scream help to god but I'm afraid it'll make them more mad what do I do I don't understand I was just talking to god I want goddd I'm so scared! :(