The past 4 days I've experienced spotting. Only a little bit not enough for a tampon by far in a variation of colors but mainly pink and brown. It's odd because I have a very predictable period . Starts in early morning or night when I'm asleep and I bleed super heavy and usually the last day I have red spotting. This time the spotting started in the afternoon and a few days early. I'm 9 days PO. I took a test just because ( ordered off amazon I got bulk don't know how reliable) and got a BFN . Wondering if this could be IB? If not something else going on ? And if it's ib how long should you test after ib? It's Very very off and I'm super confused.