I still get my period. How long is my iddah after a divorce?

وعدة حرة ذات أقراء ثلاثة والقرء الطهر فإن طلقت طاهرا انقضت بالطعن في حيضة ثالثة أو حائضا ففي رابعة وفي قول تشترط يوم وليلة بعد الطعن

The iddah of a free woman who has qurūʾ is three, and the qurʾ is purity (ṭuhr). If she was divorced while pure, it ends on entering a third menstruation; if while menstruating, on entering a fourth. In one view, a day and a night (of bleeding) after entering it is required.

أَنَّ الْحَيْضَةَ الَّتِي تَطْلُقُ فِيهَا، لَا تُحْسَبُ مِنْ عِدَّتِهَا. بِغَيْرِ خِلَافٍ بَيْنَ أَهْلِ الْعِلْمِ؛ لِأَنَّ اللَّهَ تَعَالَى أَمَرَ بِثَلَاثَةِ قُرُوءٍ، فَتَنَاوَلَ ثَلَاثَةً كَامِلَةً، وَاَلَّتِي طَلَّقَ فِيهَا لَمْ يَبْقَ مِنْهَا مَا تَتِمُّ بِهِ مَعَ اثْنَتَيْنِ ثَلَاثَةٌ كَامِلَةٌ، فَلَا يُعْتَدُّ بِهَا … وَمَنْ قَالَ: الْقُرُوءُ الْأَطْهَارُ. احْتَسَبَ لَهَا بِالطُّهْرِ الَّذِي طَلَّقَهَا فِيهِ قُرْءًا، فَلَوْ طَلَّقَهَا وَقَدْ بَقِيَ مِنْ قُرْئِهَا لَحْظَةٌ، حَسَبَهَا قُرْءًا

The menstruation in which she is divorced is not counted toward her iddah, without disagreement among the people of knowledge, because Allah commanded three qurūʾ, which means three complete ones, and what remains of the one in which he divorced her does not make three complete ones with two others, so it is not counted. Whoever holds that the qurūʾ are purities counts the purity in which he divorced her as one qurʾ, so that if he divorced her when only a moment of her purity remained, it is counted as a qurʾ.

(وَاعْتَدَّتْ) الْمُطَلَّقَةُ (بِطُهْرِ الطَّلَاقِ) أَيْ بِالطُّهْرِ الَّذِي طَلَّقَ فِيهِ (وَإِنْ لَحْظَةً) يَسِيرَةً بَلْ لَوْ قَالَ لَهَا: أَنْت طَالِقٌ فَنَزَلَ الدَّمُ عَقِبَ النُّطْقِ بِالْقَافِ بِلَا فَصْلٍ حَسِبَتْهُ طُهْرًا (فَتَحِلُّ بِأَوَّلِ حَيْضَةِ الثَّالِثَةِ) بِالنِّسْبَةِ إلَى هَذِهِ أَيْ بِمُجَرَّدِ نُزُولِ الدَّمِ إنْ طَلُقَتْ طَاهِرًا؛ لِأَنَّ الْأَصْلَ عَدَمُ انْقِطَاعِهِ بَعْدَ نُزُولِهِ (أَوْ) بِأَوَّلِ حَيْضَةِ (الرَّابِعَةِ إنْ طَلُقَتْ بِكَحَيْضٍ) … (وَهَلْ يَنْبَغِي أَنْ لَا تُعَجِّلَ) الْعَقْدَ (بِرُؤْيَتِهِ) أَيْ الدَّمِ فِي أَوَّلِ الْحَيْضَةِ الثَّالِثَةِ لِاحْتِمَالِ انْقِطَاعِهِ بَلْ تَصْبِرُ يَوْمًا أَوْ بَعْضَ يَوْمٍ لَهُ بَالٌ وَهُوَ قَوْلُ أَشْهَبَ أَوْ لَا يَنْبَغِي، وَهُوَ قَوْلُ ابْنِ الْقَاسِمِ لِحِلِّهَا بِرُؤْيَةِ الدَّمِ كَمَا تَقَدَّمَ وَهَلْ الْخِلَافُ حَقِيقِيٌّ بِنَاءً عَلَى حَمْلِ يَنْبَغِي عَلَى الْوُجُوبِ أَوْ لَا بِنَاءً عَلَى حَمْلِهِ عَلَى النَّدْبِ وَابْنُ الْقَاسِمِ لَا يُخَالِفُهُ؛ لِأَنَّ قَوْلَهُ تَحِلُّ لَا يُنَافِي النَّدْبَ (تَأْوِيلَانِ) الْأَظْهَرُ الْوِفَاقُ

The divorced woman counts the purity in which she was divorced, even if only a moment. So she becomes free at the start of the third menstruation, at the first appearance of the blood, if she was divorced while pure; or at the start of the fourth, if she was divorced during menstruation or the like (postnatal bleeding). Should she not hurry to the marriage contract on seeing it, because it might stop, but wait a day or a meaningful part of a day (the view of Ashhab), or is that not needed (the view of Ibn al-Qāsim, since she is free on seeing the blood)? Two readings are given of whether they truly differ; the more apparent is that they agree.

وَلَوْ طَلَّقَهَا، أَوْ مَاتَ عَنْهَا، وَهِيَ حَامِلٌ مِنْهُ، لَمْ تَنْقَضِ عِدَّتُهَا إلَّا بِوَضْعِ الْحَمْلِ، أَمَةً كَانَتْ أَوْ حُرَّةً أَجْمَعَ أَهْلُ الْعِلْمِ فِي جَمِيعِ الْأَعْصَارِ، عَلَى أَنَّ الْمُطَلَّقَةَ الْحَامِلَ تَنْقَضِي عِدَّتُهَا بِوَضْعِ حَمْلِهَا

"If he divorced her, or died, while she was pregnant by him, her iddah does not end except by the delivery of the pregnancy, whether she is enslaved or free." The people of knowledge in every age are in consensus that the pregnant divorced woman's iddah ends with the delivery of her pregnancy.

أَمَّا إذَا عَرَفَتْ أَنَّ ارْتِفَاعَ الْحَيْضِ بِعَارِضٍ؛ مِنْ مَرَضٍ، أَوْ نِفَاسٍ، أَوْ رَضَاعٍ، فَإِنَّهَا تَنْتَظِرُ زَوَالَ الْعَارِضِ، وَعَوْدَ الدَّمِ وَإِنْ طَالَ، إلَّا أَنْ تَصِيرَ فِي سِنِّ الْإِيَاسِ، وَقَدْ ذَكَرْنَاهُ. فَعِنْدَ ذَلِكَ تَعْتَدَّ عِدَّةَ الْآيِسَاتِ

If she knows that her menstruation stopped because of something that came up — illness, postnatal bleeding or breastfeeding — she waits for it to pass and for the blood to return, however long it takes, unless she reaches the age of menopause, as we mentioned; then she observes the iddah of women past menstruation.

(وَإِنْ كَانَتْ مِنْ الْآيِسَاتِ، أَوْ مِمَّنْ لَمْ يَحِضْنَ، فَعِدَّتُهَا ثَلَاثَةُ أَشْهُرٍ) أَجْمَعَ أَهْلُ الْعِلْمِ عَلَى هَذَا … وَإِنْ وَقَعَ الطَّلَاقُ فِي أَثْنَاءِ شَهْرٍ اعْتَدَّتْ بَقِيَّتَهُ، ثُمَّ اعْتَدَّتْ شَهْرَيْنِ بِالْأَهِلَّةِ، ثُمَّ اعْتَدَّتْ مِنْ الشَّهْرِ الثَّالِثِ تَمَامَ ثَلَاثِينَ يَوْمًا

"If she is one of those past menstruation, or one who has not menstruated, her iddah is three months." The people of knowledge are in consensus on this. If the divorce falls during a month, she counts the rest of it, then two months by the crescent, then completes thirty days from the third month.