Speaking from experience, here. Wife is an ER doc and it was still a scary situation. (He's fine, but still has the allergy 7 years later)
All that said, you absolutely should give peanut butter (and other allergens) early and often. If you don't, you're signing your kid up for much worse odds of anaphylaxis later. The good news is fatal anaphylaxis is extremely rare even in people with confirmed food allergies, and even lower in infants than older kids and adults. Even when anaphylaxis occurs epinephrine is extremely effective, so anaphylaxis deaths are almost always due to failure to treat with epinephrine. So just make sure that you have access to prompt medical treatment if you need it (i.e. not camping in the mountains far from any hospital), and give those allergens ASAP.
We did the same with shrimp and oysters. My son loves seafood gumbo and made a whole restaurant turn around when he first tried it. He loves it.
Have you stopped trying allergic foods?
she will go into anaphylaxis if you wear a jacket you brought to somebody's house who has a cat.
her blood work says the IgE count is fairly low.
they can indicate more testing should be done, but they aren't perfect. neither are skin prick tests. i can dig up some of her reddit comments about it if you're interested.
You have to work really hard with a really good allergist to get reliable results.
Avoiding allergens and hoping the child grows into adulthood (with allergies) didn't seem like a very good strategy to us.
Being afraid of accidental exposure and epipens and stuff, no fun.