It is possible for a woman to be allergic or sensitive a man's ejaculate. There were cases of this with the returning soldiers after Desert Storm. Best guess, he's been exposed to something, you are sensitive to? Start with soaps, detergents, that sort of thing.
You might consider seeing a natropath, they deal with the entire body and your life style. I sounds like you need a care giver who is educated to look at how everything is fitting togther to cause these problems. Allopaths can get in the habit of treating you as if the parts of your body are separate. What you do to one part of your body affects all of it.
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