Haiz, Istihaazah & Nifaas

Calculating days of haidh

Q: According to discretion, when my haiz started it was on 19 march 2010 for 9 days, but I dont know the number of tuhr days exactly. According to descretion 19 or 20 days.

1. How many days should I take as tuhr?

2. I get bleeding for 3-4 days every month now and keep on getting green discharge after every 3 or 4 days, throughout the month. Which days should I count as haidh?

Reading Surah Faatiha as a dua during haidh

Q: My wife started an amal quoted in Fazaail-e-Aamal in which she was supposed to recite Surah Faatiha a particular number of times between the sunnat and Farz of Fajr Salaah consecutively for 7 days starting from the first Sunday of the lunar month. After starting the amal for 3 days she started menstruating. What should be done now as her regular menstruating time is around the first Sunday of the lunar month?

Is green discharge considered haidh?

Q: A year or so after I became baaligh, I stopped getting regular periods. I wouldn't know when I would get my period next. From 2015 mid year (this is my discretion) onwards I started having green discharge but didn't know that it should be counted as haiz.

So now all the dates are a blunder as my real period was very few times a year. For the last 5-6 months I am doing ghusl almost regularly. I had pills for green discharge but I am not getting 15 days of tuhr, and for the past 5 months I am taking tablets for my periods too. Because of the tablets I bleed for 4 days every month now. During these days I continue praying because I keep getting green discharge.

Can I consider this as my haiz and the rest as tuhr (though I will be getting green discharge)?