My psych says I'm having a mixed episode, which is new for me.

The weirdest thing is that I feel like something is behind me and I don't dare look back. It feels like a cloud of anxiety and depression. It's so weird. I'm afraid if I look back it will consume me. It's very distressing.

Is this a symptom of a mixed episode? It's unlike anything I've ever experienced. It seems like a cloud of doom and gloom threatening my sanity.