Do you mind if I ask how old your daughter is? DS4 has PA & SEVERE egg, and we keep our fingers crossed with every test...oddly it is the peanut that's going down but we're holding out hope for egg, and dreaming of the day we can have mayonnaise again!
She is 3 1/2 and diagnosed with a severe egg allergy when she was around 8 months old and we had to rush her to the emergency room from a restaurant where we were eating brunch. She didn't directly ingest any eggs, but she had a sip from my water glass and I was having eggs. Another emergency trip later, and we learned she was severely allergic to milk, too. (And then she "tested" positive for PA, but we had never given it to her.)
I vividly remember sitting in her allergist's office when she was 9 months old and her allergist telling me that she was hopeful she would outgrow it "soon." I thought, great, "soon" is like, what, 6 months? She said no, about 4 or 5 YEARS.
That seemed like so long ago and every year we saw little to no improvement (if not worsening of symptoms). Finally, this year all of her levels DRASTICALLY improved such that we get to do the egg challenge and, if that goes well, a peanut challenge. She is still allergic to milk, but her levels have finally decreased after significantly increasing for the past 2 years, such that our allergist thinks that even that will resolve in the next year or so.
So, there is HOPE (knock on wood). I'm so excited (and scared) for the egg challenge in the upcoming weeks, but to be able to cross that off of the list will open up so many additional possibilities.
Good luck! I know how hard it is!