I would have had an attack with the soya milk and banana. When ever I have an attack, I start from scratch eliminating foods and keeping a diary to find the cause, it has work most times. For example I had these attacks when I working at a new job from elimination and journals I discovered it was from a cafeteria that spray perservatives on their food. After I stop eating there, the attacks went away. Sometimes for me it is a combination of two foods that had done it.