Food Phobias.

I was just wondering if anyone else has any food phobias related to fears of allergies.
my logical brain knows I have no food allergies but because I went to live with my mum for a while n my sister has one of those nut allergies where if she eats it her heart will just stop n we wasn't allowed to eat anything with nut in it, then after I got anxiety I got this big fear of nut, and wouldn't eat anything with them in. then it went from there and I got this massive fear of allergies and stopped eating pretty much everything
for a month all I ate was beans, butter and bread.
now I also eat chips, rice crispies, and cottage pie n beans but can't get myself to eat anything else.
does any body have anything like this or similar?
thanks : ) xxx.