Give us an update! Are you cured? What did you do or take?
My treatment would be 28 days of 2 million units of Nystatin, followed by 20,000 iu of vitamin A for 90 days.(5,000 iu taken 4 times a day.)
Your doctor sounds good, and the fact that an -azole helped says this is some kind of fungal infection, the most common being Candida in it's pathogenic fungal form...very hard to detect. Everybody has candida, but the fungal form is pathogenic, it sets up the mega histamine reaction that you so accurately describe....hives, random swellings, bloatings...IBS...etc.
My interest is that I study dyshidrosis...hives on the hands and feet. But it is caused by the same thing....a mega histamine reaction.