Lactose Intolerance More Condition_symptoms Which Is More Likely To Have Set Off My Lactose Intolerance?

Which is more likely to have set off my lactose intolerance? - lactose intolerance more condition_symptoms

May I have something to eat and a bar of chocolate. A few hours later had the worst stomach cramps. What is more likely that if it was? I normally do not react so badly, chocolate milk, and I thought that mayonnaise has no dairy in itself.