Dought & clear, - She gets yellowish andbrownish discharge before and during her period, and that may last all month

I am not married and my period comes regularly every month. But my
problem is that it starts off yellow, tinged with beige and brown, and
sometimes goes on for three or four days with pain in the lower
abdomen, intense agitation and bad mood. Then it becomes black for one
or two days at the most, then red blood comes for between five and
seven days, then it goes back to a brown colour, then yellow, then
after one or two days of the yellow discharge, sometimes there is a
white discharge, the sign of purity (end of the period), or sometimes
the yellow discharge continues until the next period, i.e., it lasts
for a month.
My question is: when should I pray and when should I stop praying?
When should I fast and when should I not fast?
Praise be to Allah.
Firstly:
The yellowish or brownish discharge that precedes the blood is not
regarded as the menses; the same applies to that which comes after
seeing the white discharge (that signals the end of the period),
because Umm Salamah (may Allah be pleased with her) said: "We used not
to regard the yellowish brownish discharge after the white discharge
(that signals the end of the period) as being of any significance."
Narrated by Abu Dawood, 307; classed as saheeh by al-Albaani inIrwa'
al-Ghaleel, 199
With regard to yellowish and brownish discharge that comes after the
bleeding and before the white discharge (that signals the end of the
period), this is regarded as menses, because of the report narrated by
Maalik inal-Muwatta', 130, from Umm Salamah, according to which she
said: The women used to send to 'Aa'ishah, the Mother of the
Believers, small vessels containing the pieces of cotton on which
there were yellowish traces from the menstrual blood, and they would
ask her about praying, and she would say to them: Do not be hasty
until you see the white discharge, referring to that which signals the
end of the period.
This was also narrated by al-Bukhaari in a mu'allaq report (Kitaab
al-Hayd, Baab iqbaal al-Maheed wa idbaarihi; classed as saheeh by
al-Albaani inIrwa' al-Ghaleel, 198
Based on that, the yellowish or brownish discharge that lasts for
three or four days before the bleeding starts is not regarded as
menses, and you should not stop praying or fasting at that time.
The black blood and the red blood that comes after it, and the
yellowish discharge, are menses, until you see the white discharge or
complete dryness.
If you see the white discharge or complete dryness, any discharge
after that, yellowish or brownish, is not regarded as menses.
Please see questions no. 171945, 157020and 82507
Secondly:
If the red blood continues, or the yellowish or brownish discharge
that come after it, before the white discharge or complete dryness
appear – if that goes on for longer than fifteen days, then you
aremustahaadah(i.e., experiencingistihaadahor irregular, non-menstrual
bleeding), according to the majority of scholars. Some scholars say
that istihaadah cannot be proven unless that continues for the entire
month or for the entire month apart from two or three days. This is
the view favoured by Shaykh al-Islam Ibn Taymiyah and those who
followed him and those who do not think there is any maximum length
for the menses, and their view is closer to the apparent meaning of
the evidence.
If it becomes clear that you are experiencing istihaadah, then in the
following months you should act in accordance with your cycle as it
was in the past. So you should stop praying and so on for the duration
of bleeding, until the appearance of the white discharge (signalling
the end of the period) that you mentioned in your question, then you
should do ghusl. For example, if your period, before experiencing
istihaadah, used to last for ten days, then you should do ghusl after
the tenth day, and do wudoo' at the time of each prayer.
A woman who did not have a regular cycle before experiencing
istihaadah should base her actions on differentiating between
different kinds of bleeding. This has been explained in the answer to
question no. 68818
Our advice to you is to consult a specialist doctor for treatment of
these ongoing discharges.
And Allah knows best.