I would say the headache would be sugar withdrawal
This time, I had no SBD flu as I had plenty of beans and my full allotment of dairy.
if you are hunrgy, EAT!! Don't get hung up on that its passed snacktime or too close to dinner. if you are famished at dinner you are more likely to overeat..
If you know at what time you are always hungry, try having lots of bulk at your mid-afternoon snack. Instead of having a yogurt or a serving of nuts or protein, I would also eat some chopped veg with it too. That'll give you some crunchy satisfaction and help keep you full.
In the afternoon or evening I have been having a skinny cinnamon dolce or hazelnut latte from Starbucks! You can also add in a scoop of protein powder as well. They are only 90cal and are one serving of dairy, yumm-o