Anxiety in a dream usually names a threat you're anticipating rather than one that's already arrived -- tension built around uncertainty about what's coming next. The dream doesn't need a clear danger to make sense; the unresolved feeling itself is often the entire point, asking you to notice what hasn't been settled yet.
Don't demand harmony from Mars nor fracture from Venus; be rigorous on this and never divert a celestial body from its path. - Picatrix (Andalusia, ~1000.AD)