The have been similar threads before. The gist has been that if you are allergic to a single thing such as penicillin, where exposure is rare or can be controlled there is little problem
If you carry Epi pens around the question might be asked as to why
If you have massive reports and needed oxygen that too might appear to build a problem
Obviously you can't lie, but as a doctor I recall providing treatment to my family
That was in excess of the norm - your partner had the capability to provide drugs and oxygen, but one might ask what the normal treatment might have been. Hopefully your reports will identify a single trigger - shellfish