One thought of mine is that you could be mobilising heavy metals from all the juicing like mercury and lead into your bloodstream.

Another thought is that your previously blocked or repressed emotions are coming to the forefront to also be addressed and detoxed. Anxiety is not a true emotion per se, but rather the by product of electrical energy exposure, shame from others, nonphysical machinery and thoughtform. But underlying the feeling is a fundamental emotion most definitely associated with the emptiness and dread that comes with being disconnected from source consciousness; a feeling that "i am missing out on something important" or "life is passing me by".

There are many cures but one of the most fundamental is feeling your emotions fully and deeply, and bringing a present-moment awareness into your body and mind.