Why Am I Experiencing Irregular Bleeding 8 Days Before My Period, Followed By A Normal Period?

Hi, I am a 36 year old woman and I have been experiencing some irregular bleeding from when it s 8 days to my period and the bleeding is usually not part of the period. At first when it started, I assumed my period started early, but with time, I discovered my period still comes again and run through it s duration even after the irregular flow. I don t know what the problem could be. Am I alright please?