Negative loop is a term that Dr Maxwell Maltz penned in his book Psycho Cybernetics. It's a classic self help book, he talks about self image 'dehypnotising yourself from false beliefs', the power of rational thinking etc.
I find myself saying 'negative loop' whenever I think it might have a foothold. It's a good key to remind you that it is a falsehood that must not take control. Your covering some important evergreen topics Kaylin, keep em coming :)