Question Summary:
What constitutes a period?

Question Detail:

I'd like 2 knw, if a women rubs her finger inside the vagina, n touches the cervix and notices pink blood on the tissue, is it regarded as a period or do u hav to wait till the blood flows down and whn u jus wipe to b regarded as a period? Jazakallah 

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh. 
The blood will be regarded as haidh only if it comes out by itself and is visible outside. In the enquired situation, the blood is still inside. It will not be regarded as haidh. ^[1]
And Allah Ta’āla Knows Best
Huzaifah Deedat
Student Darul Iftaa
Lusaka, Zambia
Checked and Approved by,
Mufti Ebrahim Desai.
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منهل الواردين ص 122 دار الفكر[1]
خارج من فرج الداخل:احترازا عما لو احست بنزوله الي الفرج الداخل ولم يخرج منه فليس بحيض في ظاهر الروايه