Extreme hunger generally means your dose is too high. Also, since you are only on your 3rd VLCD you should be aware that there can be hunger throughout the first week as you body adjusts (especially if you were not eat low carb before begining HCG).
What I would do:
Lower your dose to 150IU (some people have trouble with Hucog and like thier doses lower), then early next week see how your hunger is. If your hunger is still terrible, then do a skip day. If you hunger lessens throughout the skip day, your dose is too high. If your hunger increases, then your dose is too low. Adjust by 25IU as necessary.