Can Cannellini beans cause burping, nausea & upset stomach? I had 3 bowls of homemade Cannellini bean soup tonight and I feel sick! Possibly fullness?

Really now. You should have a better diet than that. All beans and no fat makes Kay a sick girl or something like that. While beans are a good nutritious food as they say "Moderation in everything, including moderation". This too will pass and have a more well balanced diet.