I have a problem regarding Ramadan and fasting. Actually I suffer from irregular menstrual cycles. Today, During fasting, I saw some little dark blood, and I cannot determine if it’s haidh or istihaza, because of the irregularity of blood appearing. Meaning one day I will see little blood, and on the same day, after few hours there will be no blood. In this case what should I do? should I consider this as, Haidh or istihaza?

This is not Haidh but rather Istihaza. You will go by the ruling of Istikhaza and continue with your prayers and fasting until the blood comes and continues the way it normally comes. That’s the time you will consider haidh. For now, it’s not Haidh.