NEED HELP!! IS AF CLOSE OR IS IT REALLY IB?!

Itzel
I had brown and a bit of pink discharge on the 18th. Then it stopped, but today when I wiped I noticed that the toilet paper had pink but very light. I was hoping that it was IB since AF isn't due until the 30th maybe even the 7th. Should I just stop getting my hopes up?): I had planned to take a test tomorrow or on Thursday but now that I'm not sure if it was IB I don't want to waste a pregnancy test just to get a negative once again.