Women's Issues

Making qadha of salaahs from the time one's haidh ends

Q: I am at the end of menses and I saw discoloured discharge at the end of asr, a few minutes before maghrib was about to begin. The next time I checked was the next morning after sunrise, 6 hours before zuhr - this time I saw clear discharge. I waited until zuhr/asr to check again to ensure my menses had truly ended. I then did ghusl at asr and made qada of zuhr and fajr. Do I have to make qada of the previous days asr, maghrib and isha prayers?

Calculating haidh if one does not have a 15 day period of tuhr

Q: 

1. If a women bleeds for seven days and 23 and a half hours then that's her habit? 

2. If a woman thought that only red blood was haiz, so at the times when she had brown discharge she didn't note it down as days of haiz, then how must she count her Haiz days in the following case if she had a full 15 days of Tuhr thereafter she saw a brown discharge, and thereafter red blood but she is unsure whether or not she had a full 15 days of Thur in between the brown discharge and the red blood, then must she count her haiz days from the time of the brown discharge or from the time when she saw red blood?

Woman making her salaah qadha due to delaying in checking if her haidh started

Q: I prayed zuhr after it had ended because I'm due to begin my period and earlier when I checked my discharge, it seemed somewhat dark but I still wasn't sure. So I kept checking until before asr. However, I delayed it too long and checked only a few minutes before asr was due to start before I decided I felt more inclined towards me not having started my menses as my discharge appeared repeatedly clear. I ended up doing wudu and praying zuhr after asr began (without doing ghusl). Am I sinful?