The gas and and cramping shows that there were some major obstructive waste pockets that were being eliminated. When they started to get broken up and moved out, some of the released toxins entered the circulation, which led to the dizzyness. This is simluar to what can occur during a flu attack. Once the blood is detoxified again, the symptoms disappears. You did well. Having such blockages can cause major distress to the inestines and the body at large.