I don't think the pills you bought are hcg are they? They are just aminio acids? GNC recently got in trouble for passing off aminio acids as HCG.
The real diet is here:
The menu is here:
Unless they list HCG on the ingredients I would take them back and buy homeopathic hcg from someone else. You will still lose on the aminio acids because at 500 calories you are going to lose weight but I haven't seen anyone that could stay on them. You do not get the benefits of the hcg, you'll lose muscle, be hungry etc.