If you run a bath, get in it, and discover that the water is too cold, because someone else has had a bath before you and has used up all the hot water, it's no good running the hot tap, because firstly there's too much cold water in the bath already, and secondly the water coming out of the hot tap is tepid.
No, what you have to do is drain the bath, go and wrap yourself in something, put the hot water on, and wait. When the water is hot, you'll be able to draw a fresh bath, but, until then, you have to go and do something else. The absolute worst place to wait is in the cold water.
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Sometimes, a situation arises, the ego breaches the castle's defences, and the bailey [fortified enclosure] is overrun with the enemy. You have to retreat to the motte [the keep, the hard-to-take wooden or stone tower]. Do not stay in the bailey or you will be killed.
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When fear, fretting, gloom, negativity, etc., get a grip, you cannot solve the problem from within the problem.
In the first analogy, the water has to be drained from the bath, in other words the mind (and in fact the physical body, including the brain) has to be detoxified. The allergy has been triggered, and even the most casual reference to the topic in question releases a gush of torment, a flurry of arrows. No, the whole system has to be flushed clean.
In the second analogy, the tower must be retreated to, which the enemy is unable to overrun. Eventually the enemy gives up and retreats. You can then rebuild the defences. You cannot repair the bailey (the fences, the pallisades, the ditches) whilst the enemy is still there, weaponised.
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So what do you do?
Firstly, recognise that something has gone terribly wrong. This requires honesty.
Secondly, recognise that you cannot fix the problem from within the problem so must retreat. This requires humility.
Into what? Spiritual contemplation of higher matters (the love of God, for instance: spiritual books and speakers, e.g. the Big Book, the Twelve and Twelve, Emmet Fox, Joyce Meyer, Ernest Holmes, A Course In Miracles, etc., will abound with ideas to contemplate), combined with vigorous service.
Stabilisation can take a day or more, usually several, in severe cases weeks or months.
Then, and only then, can you revisit the topic.
If the enemy's grip is very strong, you may need a stiff chat with a grown-up to set you straight in terms of broad outline of why the problem is not the problem you think it is and how there is a definitely a way through the situation that will lead to an optimum outcome if one places oneself in the hands of God. But the detailed analysis of underlying causes cannot be dealt with during the acute situation. This must be postponed until the system is restored to ordinary function.