Confused about my🩸🤷🏻‍♀️

Okay so my period was supposed to start on the 14th and end on the 19th. I had some light bleeding and spotting the whole time. Not a full period. This is the first time my period has been so light and spotty. I took a pregnancy test on the 17th, it was negative. I’m just confused because this has never happened before. Any advice?