M.R.
I think, what ever the cause, that you should see a doctor today. When ever you have a breathing issue, it is something that should be seen right away just in case this is only the begining of a problem that could get bigger. I would try not to suggest what it could be, and just tell the doctor what happened, and let them ask the quesitons so that you get an unbiased opionion and you don't over influence what they consider, just in case it has nothing to do with the peanuts, and what you have instead really needs attention.
M.