Allergic to Preservatives

I am allergic to preservatives (will only know wich one in next year Feb as this is the only booking that I can get as soon as possible)

Currently I'm scared to eat anything packed or not fresh from the store but now cooking fo rmyself became difficult as most ingredients have preservatices unless it if fresh for the butchery. Plain and simple I don't know what to cook. I grave for something sweet but don't know what to buy

Can someone please help me by answering what in the shop don't have preservatives?