Thank you for reaching out to us and for your kind words.

The logic behind releasing a woman with a consistently longer interval from yom hachodesh and onah beinonit is to consider her as having a sort of veset kavua to not have a flow during the first thirty days of her cycle.

A woman who deviates once from a veset kavua needs to ovserve the change once, and then can ignore it if she reverts to her usual pattern. For that reason, ordinarily, if a woman would have a shorter cycle on just one occasion, we would say that she could revert to observing only the interval veset as she had been after the single cycle of observing chodesh and beinonit.

Your case is a little trickier, however, because the earlier interval you had was on the onah beinonit itself, and the onah beinonit is treated as a sort of veset kavua that one needs to uproot. It's not clear that your veset to see only later is strong enough to overcome an onah benonit on which you had bleeding.

For this reason, we would consider you released at this point from your onat chodesh, but obligated in observing onah beinonit two more times before going back to where you were.

You note that you consider yourself to be having a period on Mirena. Some women do get a period on Mirena. Others have only staining, but not a flow. We would be happy to discuss this with you further if relevant.

Please be in touch with any further questions.