At this stage I would go for a MT (Mother Tincture ) to boost the immune system and the one I am thinking of is Ceanothus. Are you taking Echinacea which is another immune boosting herb. I once had a patient that had an agg with Carc and I cured it by giving a remedy that the symptoms now matched and in that case it was Caust. I prefer to give Carc.in a 30. 200. 1M over 24 hours to prevent aggravations. BTW I was told once that Silica is an antidote to Carc agg but have never tried it out!!

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RSHom - Registered Homeopath