Mistypaw! And congratulations for doing so well on your first week of Phase 1!
Strickly speaking for myself, I'd be thrilled not to have an appetite and would enjoy that feeling while it lasts.
As for your other "problem", it may be because you are drinking more water and losing weight, but I'm not sure. As long you don't have a tummy ache or are feeling ill, it will probably clear up soon.