Can You Pray With Brown Discharge after Period?
Question

I am a woman who has continuous yellowish discharge. And I am of those who do not have a sign of Tuhr (purity of menstruation). And I do not know how to make sure of my Tuhr in that case. My period is seven days (obvious blood for 7 days). After this I find brownish and yellowish discharge.
My question is: if the brownish discharge disappears and the yellowish remains, shall I consider it menstruation or my normal yellowish continuous discharge? As sometimes the brownish discharge disappears for a day and the yellowish one remains, so I make Ghusl and pray, then the brownish comes out again sometimes once a day. This puts me in great confusion. Shall I repeat Ghusl or not?
Praise be to Allah.Are ongoing discharges that come out of women pure?
The ongoing discharge that comes out of woman is Tahir (pure) according to the most correct of the two scholarly opinions, but it invalidates Wudu and the woman who has this problem must deal with it like urinary incontinence, so she should do Wudu for each prayer and pray whatever she wants of obligatory and supererogatory prayers. 
How do you know when your period is over?
A woman may know that her period has ended by one of two signs: 

Emission of the white discharge. 
Complete dryness, such that if she inserts a piece of cotton it comes out clean with no trace of blood or yellowish or brownish discharge on it. 

Al-Baji (may Allah have mercy on him) said in Al-Muntaqa: “The usual sign of Tuhr (end of the period) is two things: the white discharge or dryness, which is when a woman inserts a piece of cotton or cloth into her vagina and it comes out dry with no trace of blood on it. Women’s usual patterns with regard to that vary; some of them see the white discharge and some see the dryness.”
Can you pray with brown discharge after period?
If the yellowish or brownish discharge comes immediately after the period then it is part of the menses. If it comes after the Tuhr has been established, then no attention should be paid to it. 
Al-Bukhari (may Allah have mercy on him) said in his Sahih: Chapter of the coming and going of menses; the women used to send to `Aishah (may Allah be pleased with her) vessels containing pieces of cloth on which there were yellowish marks and she would say: Do not be hasty until you see the white discharge, meaning thereby the end of the menses (Tuhr). 
The colour of menstrual blood usually changes towards the end of the period, and becomes lighter in colour, and it may be followed by a yellowish or brownish discharge . The report of `Aishah (may Allah be pleased with her) indicates this, and indicates that the yellowish discharge that is connected to the period is regarded as menses. 
The basic principle is that you should regard this yellowish discharge as part of the period, not spotting, so long as you have not ascertained that the period is over, especially as you see the brownish discharge after doing Ghusl. This makes it more likely that it is menses. 
However, if the end of the period is ascertained by seeing the white discharge or complete dryness, then you should not pay any attention to the yellowish and brownish discharge in that case. This is what is indicated by the words of Umm `Atiyah (may Allah be pleased with her): We used not to regard the brownish and yellowish discharge after the Tuhr (end of the period) as being of any significance. (Narrated by Al-Bukhari, 320 and Abu Dawud, 307) 
And Allah knows best.