gcoop, Enpresse 28 is a triphasic pill (it is a generic Triphasil). That means every single week has a different hormone combination. These pills needs very special care when you want to skip your period to prevent bad side effects. Three methods exist in order of preference:
1) Take PACK 1 : week 1, week 2, week 3; PACK 2 : week 3; PACK 3 : week 3; PACK 4 : week 3 and then the 7 inactive pills. Throw away all the unused pills or keep it for in case you loose a pill or forget to get a new pack in time.
2) Combine the two packs and finish week 1 from both packs, week 2 from both packs, week 3 from both packs and then 7 inactive pills from just one pack.
3) Take in order the first pack, week 1, week 2, week 3 and then pack 2 week 3, week 2 and week 1 and then 7 inactive pills.
You should be OK now by just stopping 3 days early. It is however not quite clear what your bleeding pattern will look like. There are also other ways to control your flow without resorting to manipulating your pills. Look at disposable menstrual cups (like the Instead SoftCup). It fits at the top of your vagina, catches your flow for up to 12 hours and does not interfere with any physical activities or sex.
Best of luck!