YOu just sound really anxious right now. But if you get your sleep cylce too badly messed with (taking melatonin near sun-up definitely will mess with your brain since your brain produces melatonin at night) you'll go somewhere not good. You need to do whatever you can to be able to feel safe enough to sleep alone and be alone part of the day. Why are you so worried about being alone? I think you've said you don't feel you are a danger to yourself. Am I remembering wrong? (This is possible; stay-at-home is messing with my memory).