I have many food allergies and/or sensitivities. I've eaten cashews for years but had to stop recently because they cause me to feel nauseous and my throat feels a bit itchy. I've learned to recognize this reaction because I've experienced it over the years. I tested allergic to chocolate. I can eat small amounts, weeks or months apart, but if I get careless and eat too much I have the same feeling.
In response to Michelle B.'s post, and to add to my knowledge and to confirm her info in a small way, I do easily get poison oak and I'm allergic to mangoes and pistachios. Instant response to those foods. Break out in hives, internally with itchy ears and throat.
I also have reactions to walnuts and sometimes almonds. I wonder if the amount of protein in nuts is different in different nuts because I can eat all nuts in small amounts and infrequently without getting a reaction.
Babies frequently outgrown food allergies. My granddaughter is no longer allergic to milk protein and eggs. Hopefully, at 3, if she's allergic, she will outgrow it. If not, both of you will get used to reading labels and limiting exposure. It's tough at first but I'm used to it and my 10 yo granddaughter reads labels all the time for the presence of peanuts and seems to actually enjoy doing it.
Later: I'm puzzled about the epi-pen comment. No one in my family has an epi-pen except for the one with peanut allergies. The school nurse has epi-pens for 6 students and they're for peanut allergies. It just doesn't sound like your daughter's allergies are that serious; so I'm really curious what the allergist says.
I did have a serious reaction to poison oak. Put me in bed with a fever for several days and it took weeks for the patches to heal. I was so sick, I only got out of bed to go to the bathroom. Didn't even eat. I did go to the doctor after a couple of days because I wasn't sure it was poison oak. I'd not ever been sick with it before. I went back a few weeks later because the oozing patches didn't improve and in fact got worse. Doctor said this was a serious reaction and started a round of cortisone. Doctor didn't suggest an epi-pen and my reaction was quite serious according to him. I don't think I've been exposed since but now I'm concerned. I am aware that successive exposures usually result in increased responses and that response was bad.