I would avoid dairy products. It is unusual in adults for food allergens to drive chest symptoms but it can occur. You should see an allergologist and seek advice. You already have an epipen. I would also get appropriate inhalers to use if you inject dairy products by accident and they could also advise you about antihistamines. There are also potential desensitisation regimens that can be used but this gets into complicated territory and you need to seek the advise of a good allergologist on this.
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