Can you get allergic out of no where of something you ate always?

For the last 3 weeks, i realized that each time i eat tomatoes i get sick, like huge stomach pain and yeah... i thought was only to raw tomatoes, but today i tried rosé sauce and still the same.... it never used to do that. I feel extremely nauseous and my stomach hurts big time 🥺

I guess no more tomatoes for me and i LOVE tomatoes 🥺

The question now is how am I gonna live without pizza 😲