That sounds all too familiar for me. I became paranoid of everyone I knew, and ran away to another state. There was maybe a half ounce of sanity left in my mind during my breakdown as I returned home and checked in. I didn't end up homeless though, I'm sorry you had to go through that. It's difficult to tell with the mood swings because you feel it and your mind perceives it as reality. I am a very self aware person. I pay close attention to my moods and thoughts and analyze them all the time. It isn't burdensome to do so, I've just become acclimated. That being said, mood swings are the definition of psychosis, for me. 10 minutes I'll be fine, thinking about the beautiful world, beautiful music, beautiful sky, beautiful humanity. The next 10 I'll be thinking about something somebody said, or meant, or why the lyrics in that song say just that, and then my mood tanks.