Based on your description, that bleeding was very light and seen only on colored surfaces and on toilet paper used not immediately after urination, it did not make you niddah. However, in this situation we do recommend that yo abstain from relations for twenty-four hours or until staining subsides, as a precaution against a flow beginning during relations. This is a recommendation and not a strict halachic requirement.

Skipping pills reduces their efficacy as contraception and thus care should be taken not to skip them. While the situation you describe probably leaves you protected, we suggest that you discuss this with your physician as well (or consider using a spermicide as a back up method for this cycle). Skipping pills also may lead to bleeding as you experienced. Therefore, if your plan is to try to extend the time that you are not niddah by extending the active pills, we suggest being careful to take them daily without a break.

Please write back with any further questions.