I was fasting and then my periods started. So now what do I do? Can I break the fast or continue?
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيْم
In the name of Allah, the Most Gracious, the Most Merciful
You should break your fast and do qadha afterwards.
For more information, please check the following website; https://daruliftabirmingham.co.uk/if-a-women-starts-her-period-during-her-fast-does-the-fast-break/
Only Allah knows best
Written by Alimah Sumeyye Sofu
Checked and approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham
 al-Hidayah p.111 v.1 Maktabatul Bushra