Brown Spotting/Bleeding A Week After My Period Ended?

My period ended Jan 24th and I've still been having a little bit of brown bleeding or spotting the past week. I don't know why it's happening. Usually I spot a little bit a day or two after my period ends and then it stops completely.. but it's never been spotting so long afterwards like it is now? It's been a week and I'm starting to worry. Sometimes I have to wear a pad the spotting is so much.