Hey guys I'm new to this so just bare with me 
So yesterday afternoon I went to the toilet and when I wiped I had a light pink spotting however it didn't last long next time I went toilet it was all clear! I know it couldn't be my period as my period is 12 days away till it's due!
So I didn't really think nothing about it until just now I went toilet and wiped and there was a dark brown spotting (you can clearly see it's not red or blood) I am honestly so confused because it's not even a long flow, it will be there one minute then I won't see no more till the next day or few hours after what could this be?
I took a pregnancy test as their is a chance I could be pregnant however that came out negative.... maybe it could be too early to test.
But what is the cause of this, if any of you have any ideas please let me know xx
(The first two photos of light pink spotting is yesterday when I went toilet, and the third photo of the dark brown spotting is today)