ANSWER:

You should not hasten to make ghusl until you experience either complete dryness or no colored discharges when you wipe. 

If you saw a white thread like discharge, this marked your purity and you can disregard these colored discharges as nothing.  

Kindly refer to the following link(s):

RE: menstruation, today I saw a bit of white discharge and did ghusl and prayed then I saw brown and red, do I pray or wait to see white again? Note this always happens and only the next day I see the coloured discharge! It gets so difficult

Menstruation and post-natal bleeding | January 28, 2018 1:21 am
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Sheikh, pls i was told woman can enter the mosque during her period for purpose of islamiyya, that at the moment islaiyya is going on in the mosque then it is permissible.