Anybody suddenly allergic to foods while pregnant?

I've never been allergic to any foods til this pregnancy. If I eat almonds, walnuts, or pecans my tongue starts getting fat and my throat closes up. Benadryl has been a godsend. I've been allergic to those things since about 5 months pregnant. Now at 8 months, apples, canteloupe, and cinnamon are doing the same thing. What in the world? I'm wondering now how many more things I won't be able to eat by the end of this pregnancy.