Seeing a coloured discharge three days before one's haidh

Q: It was the time of my period and I got a peach discharge, it wasn't a dark peach. So I asked my teacher and she said that it is my period. (I don’t get any colour discharge during my tuhur period). so I took it as my period, I never discharged more of this colour, I discharged clear and white. I only started bleeding 3 days after I saw the peach discharge. Please advise whether the 3 days in which I saw nothing was actually my period, or did my period only start when I started bleeding. This happened during Ramadhaan.

Musaafir mistakenly performing four rakaats instead of two

Q:

1. A musaafir read four rakaats salaah unknowningly and after a couple of days he corrected it to two rakaats. Will his salaah be valid?

2. A musaafir read two rakaats but someone told him to read 4 rakaats and due to confusion, he reads four rakaats. Does the first salaah count and will the second salaah which was read as four rakats be regarded as nafl?