You've been reading kinsfire, haven't you? Hermione is bound and determined to have Harry(YES! does Snoopy dance) and is using her rather impressive intellect to get what she wants.
Doctors Granger seem more accepting of Harry, and of their developing relationship, than most. Both realize their daughter will soon become intimate with her chosen, and are planning for it.
There are only two things I can point out, that you might want to re-check.
1)Five Galleons is a huge amount to pay for a taxi ride, given that Harry paid seven for his wand, the single most important item in a wizard's possession, and given that the knight bus only costs eleven sickles, (unless one wants chocolate and/or a toothbrush)
2) It takes a bit longer than two days at short rations, for the stomach to react to food the way as you've painted. Starvation for two or more weeks, or bare-minimal food for several weeks, will produce the effect you want.
As before, I eagerly await the next page of 'Independence Day'. Alorkin