Allergic Reaction

This afternoon, as I was nursing you, Katy, and you had *almost* fallen asleep for your nap, the left side of your face broke out into hives! The hives started joining to form plaques and the area was red and warm to the touch. The hives got awfully close to your left eye making it slightly swollen. Needless to say, this scared me and I woke you up immediately (you know it must have been bad if I'm waking you up from a nap- no mother willingly wakes her child from a nap!). I applied some hydro cortisone and called the doctor. After talking to the nurse and running out to get some Children's Benadryl (why did I not have any on hand?!), I don't know what caused the allergic reaction. The hives were gone by the time Daddy came home from work and you were your usual happy, smiley self. Could it be the pears and blueberries I fed you for breakfast? Could it be the detergent used on your winter coat? Something in the air when we went grocery shopping, this morning? The sugar cookie you ate while at Harris Teeter...?