I gave my DD a little scrambled egg at about 11...

I gave my DD a little scrambled egg at about 11 months and she had a reaction to it - runny nose, red/puffy eyes and was really upset for about an hour or so. After that once it was out of her system she was fine. While she was eating the egg though she absolutely loved it! She's been fine with little bits of egg in cakes/biscuits/savoury foods since then with no reaction at all. How long do you think I should wait to try again on the egg? She's now turned 12 months so this was about a 1.5 months ago. Neither my husband or I have reactions to foods so I am hoping it is something she'll grow out of? Thanks so much