Pregnancy safe alternative to an epi pen?

Elise
I had an anaphylactic reaction to something I ate last week but was to worried to use my epi pen b/c I found out it is considered "class c" drug. I was able to stave it off with time and a lot of Benadryl but I was very close to the point where that might not be an option. Does anyone if there is anything similar to epi pen that is class a or b?