The MA law does not say that you have to have every seventh day off, only that there be one in every seven consecutive days. It is possible to work up to 12 days in a row and still with in compliance with the MA law as written.
Additionally, you have not indicated what industry you are in, but the law in question applies only if you work in a manufacturing, mechanical or mercantile establishment. If you work in any other industry, the law does not apply at all.

