Is this implantation bleeding?

Diamond • Florida. 19 yrs young. Certified Medical Assistant
AF WAS DUE 09/20. From 09/20-09/24 I have had nothing but brown discharge/bleeding and cramps, no red blood at all. I use tampons and remove them every 5 hours. When i remove the tampons, they are no where near bloody, only one side is brown and the other side is still white and clear. My cycle are normal heavy and I usually will fill up tampon quick. This morning my tampon only had a tiny bit of brown and the rest was still white and clear as if my cycle was about to end. My cycle is usually 7 days .