For a while now, I will see something out the corner of my eye. It's always the corner, never directly in-front of me. I see a face, or a person (on occasions), but I only see a glimpse, it kind of like an eye-floaty, you know it's there but when you try and look it, vanish. It gives me chills, I try and use reason to calm myself down, or say my mind is playing tricks on me, but when I think about how vivid the hallucinations are, the sheer terror is indescribable. I truly want to say I do not see anything. I feel sudden bursts of anxiety, this only comes after the hallucination. I felt like I needed to talk about this, somewhere. Please help.