She saw the tuhr then she had some discharge – what should she do?
Question

                My period lasted six days and on the sixth day the bleeding stopped. I used a piece of tissue to make sure, and a little bit of white discharge was coming out. So I did ghusl and my husband had intercourse with me that night, then I did ghusl and fasted (as it was Ramadaan). Then at Zuhr time I noticed some discharge in which there was a slight amount of red or yellow. I do not know what the ruling is. Do I have to make up that day or not?.
Praise be to Allah.
      We do not know what you mean by “a little bit of white 
      discharge was coming out.” If what you mean is that you saw the white 
      discharge which is the sign of purity (tuhr), then whatever yellowish or 
      reddish discharge comes out after that is not regarded as menses, because 
      Umm ‘Atiyyah (may Allaah be pleased with her) said: “We did not regard the 
      brownish or yellowish discharge after the tuhr as being anything that 
      mattered.” Narrated by Abu Dawood, 307; classed as saheeh by al-Albaani in
      Saheeh Abi Dawood. 
Based on this, your 
    prayer is valid, and there is nothing wrong with your having had 
    intercourse, because you were not menstruating. 

    But if what you mean is that you saw that the discharge was 
    still yellowish or reddish, this means that the menses had not yet ended. A 
    woman should not be hasty in deciding that the period has ended when she 
    sees yellowish or reddish discharge, no matter how little it is. The women 
    used to send pieces of cloth to ‘Aa’ishah with yellowish discharge on them, 
    and she would say, “Do not be hasty until you see the white discharge.” 
    Narrated by Maalik, 130. 

    Pieces of cloth refers to what women use to check whether 
    there is any trace of menses left or not. 

    See also question no. 
    66062. 

    Based on this, then you have to make up that day, because it 
    is not correct to fast when one is menstruating. 

    With regard to intercourse, there is no sin on you in sha 
    Allaah, because you thought that your period had ended, and you did not 
    deliberately commit a haraam action. Allaah says (interpretation of the 
    meaning):

     “And there is no sin on you concerning that in which you 
    made a mistake, except in regard to what your hearts deliberately intend”

    [al-Ahzaab 33:5].