There is much to be found about anaphylaxis and allergies, and the natural progression of this. Take a look at:
http://www.foodallergy.org/
http://bmj.bmjjournals.com/cgi/content/full/316/7142/1442
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=12911775
Since you have had two anaphylactic episodes now, and this last one was more severe, it is likely that any further episodes will also be severe. There is a limit, however, to the extent of the severity, and since this last reaction sounds like it was substantial (as anaphylaxis can be), any future episodes are likely also to be similarly substantial - they will not, however, continue to increase in intensity to the point of infinity.
The reason for a progression in anaphylactic response is that your body becomes increasingly sensitized to the allergen (nuts, in your case), and certain immune substances are produced by your body in a misguided attempt at handling the ingestion of nuts, which should be harmless. Your body has targeted nuts as very dangerous, and when you ingest them, many immunomodulators are released that themselves are very dangerous.
Take a look at these references. I would advise that you are very careful, make a serious effort to avoid exposure, and always carry an Epi-pen and get a medic-alert bracelet, as well. Far too often, people don't follow these simple procedures, and then are in a great deal of trouble when the situation arises. A penny of prevention is, after all, worth a pound of cure.
I hope this helps. Please let me know if you have any further questions - I'm more than happy to help. Take care - Dr. Fay
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