Woop! Well done mudbabe! Great feeling huh?
Ref the exercise, it's actually recommended we don't exercise while doing a VLCD. Gentle toning exercise is fine (like pilates etc), but nothing cardio. The few calories we are getting are too busy burning our body fat, if we use them doing exercise, we actually find we don't lose as much, which is a bit of a pain as we feel we have been working extra specially hard!
If I were you (not knowing how much you have to lose), I would forget the exercise for a bit, just do a bit of pilates or similar three times a week at most, and then when you get nearer to goal start increasing the stuff you're doing to tone up properly.
VLCD + proper cardio is a definite no-no... even on 4 packs.
Good luck with your first weigh in x x x