Please let me clarify that I'm not insane! I am freaking out!

Last night, I was visited by a spirit.....first it freaked me out because I heard someone walk in front of the fan and nobody was there, but when I turned back around a faded white figure rushed into my hallway....at first I was thinking "maybe its a wandering spirit"

But what REALLY got me.....I was on the phone telling my Fiance what had happen, he told me to calm down....well I calmed down and while we were talking, we were interuped by a hissing/growling noise on the phone line and all of the sudden(I was laying on my stomach at this time) I felt terrible pressure on my back and my body felt like it was on FIRE! I was screaming and saying "I'm scared!" over and over and when I said "Help me!" it was over, but I did not go to sleep until 6:13 this morning.....I was too terrified that it might return.....It MUST have been an evil spirit....or maybe....a demon?

Now, I'm going to sleep with the Bible cutched tightly in my arms....

Can someone help? Or give me advice?