Bleeding/implanon and pill

Erin • 21. Mama to a baby boy 💙
Ok so I have the implanon in my arm and because I was non-stop bleeding my doctor said to take the pill as well. I stopped bleeding for 2 weeks and now I have like spotting but it doesn't look like period blood, it's darker- like a browny colour and it'll happen like once throughout the day then not the next day so it's kind of irregular. Just wondering if anyone else has experienced this or whether it's normal?