I have been diagnosed with anxiety disorder and panic attacks, and it is starting to affect my sleep. I have undergone severe amounts of stress in the last month or two. For the past few weeks, I have noticed that I am hearing things right before I nod off. It usually isn't so bad - maybe a knock at the door. But last night, I woke up quite anxious. I tried to go back to sleep, but as soon as I was about to, I heard a very loud and vivid voice saying, "hello!" I'm so scared about this. I'm worried that I am now developing schizophrenia or something. Would this have any other explanation? Perhaps high amounts of stress and disturbed sleep? On a good night I can only get around 6 hours, and I'm constantly waking up during the night. I'm on meds - 50mg sertraline which I started nearly 2 weeks ago, and 2.5mg of olanzapine for anxiety. Please help, I'm so scared that I'm going mad and will never sleep again!!