A bs of 63 an hour after that meal sounds low to me. If you can borrow a monitor, test your sugar first thing in the morning. That is your fasting level. Then eat and test it at one hour, two hours and three hours. A banana is 120cal and 30g carbs, the orange is 60cal and 15g carbs, the cereal with milk maybe close to 200cal and 20g carb. A fasting reading for a person without diabetes should be between 70 to 105. It will rise after a meal then lower by two hours it should be under 140. I may be off some on the levels. Levels to high can cause a lot of long term problems, eyes, feet, liver, many others. Low blood sugar can be an a serious problem now. Symptoms such as anxiety, irritability, fear, sweating, flushing or pallor, numbness, chills, headaches, dizziness, weakness and faintness are common. If it drops too low you can go into a coma. I do not mean to alarm you but you need to keep a close eye on this.