It doesn't matter if you shorten the inactive phase, but it does if you lengthen it. So if you start your inactive BC phase on a Monday, should resume on a Sunday or whatever but start a day early, no problem because some women have no break at all and it really isn't a problem.
If you lengthen the gap though and started the active pills again late, that is a pregnancy risk.
You might want to think about a continuous pill, much more convenient.
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