This happened to me. I was eating lots of eggs every day, and suddenly when I'd eat them I would have severe stomach cramps, nausea, sluggishness and just generally yucky feeling.
I waited a few months and tried them, and have found that I can tolerate them when the yolk is completely cooked, like scrambled, omelette or in something but I can't do runny yolks. I had poached eggs and the stupid stomach cramps were intolerable. Hoping that with time I'll be able to have my beloved poached eggs again.
The more I see the less I know for sure.