Light brown discharge?!

Yasmin
Yesterday I had some light brown discharge when I wiped, no pain no cramps. I rang my doctor who told me to take another pregnancy test that night and to see her in the morning if I was still having the discharge. My clear blue digital still says pregnant 3+ and this morning the discharge is pretty much back to normal again (white/cream coloured). 
Should I be worried? Has anybody else experienced this I am panicking because it is my first pregnancy and I have no idea what is common/normal. 
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