Did I lose my salvation?

I became born again 5 years ago and lets just say I have some reasons to believe I may have some forces within me that are bringing me down, almost to the point of giving up completely. I don't understand it. The only way I can describe this feeling is like being told the worst news of your life every moment of every day all day-I'm so angry with everyone for no reason, I almost feel on the verge of hating people. I wake up crying and go to bed crying-I can hardly look people in the eyes without my heart constantly dropping to my stomach, I feel their love and concern for me and I feel repelled from it somehow. I dont understand whats happening. I have given into temptation but can say now that I have repented of my sins and am living a clean life and am BEGGING Jesus into my life but sometimes just the mere mention of God makes my blood boil. I've seen numerous psychiatrists who can't seem to find anything wrong with me, I've begged them almost to diagnose me schizophrenic but they only tell me I'm fine. No medications help. I even payed 3,000 to go to the Amen Clinic in Fairfield, CA to have a SPECT brain scan done to see if there was something wrong with my brain and the doctor said it was healthy, even with drug use that my "symptoms" weren't caused from anything organic. I don't feel God's presence, my uncle tells me I'm possessed and tells my little cousin behind my back that I'm evil. I don't want to be around anyone but miss them all terribly at the same time. I've contacted a priest to see what he thinks, I've read the most recent book "The Rite" about modern day exorcisms and at first I was a little skeptical but I've tried everything else. I know God is real, I know that Jesus is real...I'm a born again Christian, of course demonic possession is real too...I just don't know what it would feel like...Even if a Christian who was saved and sort of fell away but repented was under demonic attack, if they're under demonic attack does that mean their salvation is lost too? I'm pretty scared about this. Thanks.