Hi, to answer your question it would be more convenient if I knew your weight and height in order to understand your weight loss better. But since you are trying to lose weight, it is ok to take Herbalife products. However, if you have a headache in the afternoons, it could mean a low water content in your body. I advise you to drink more water & liquids, water and juices primarily are preferred.You may also discontinue the Herbal products and also try if the headache stops with that. Be warned that I do not recommend these products since their contents are herbal and unknown to me, also at times they might affect the kidney adversely.