You wrote you were visiting your in-laws. Is it possible you had a different brand of orange juice than usual and had an allergic reaction to something in that brand?
Did you have anything else high in histamine since then (aged cheese, dark chocolate, fermented foods, red wine, ...) and experienced the same flush of the skin?
If you still have problems breathing, baking soda could also help. One teaspoon of baking soda in some water.