AF/spotting HELP

Okay so I've been spotting/on my period for the past two weeks now, this has never happened before. Before I got my period I was spotting on and off and when my period was supposed to come it didn't. It ended up coming late and since then it has been on and off, right now I am still bleeding but have no idea what to do. I took a pregnancy test but it was a BFN, is there a possibility I could still be pregnant?