Hi Ammie,
you do not have a break in between packs. You should have a bleed after the first pack when you start the new pack , this should happen within the first week of the new pack.
You need to give your body at least 3 months to adjust .Do not worry or panic if your bleed is longer , different or comes at a different point in the pack than you expect , or indeed you may miss it. All this is normal if it happens and should settle down in time . If you read through my recent posts you will see I am on Femosten and it took 3 months for it to kick in and work. The thing is not to panic . You may get a bit of PMT , I did and it was very bad the first month , but is improving. If you feel worried , just post and someone should be along to reassure you.
Good luck
Pepperminty xx