Bleeding while on the pill

Maggie • Wife to Cody - 10/17/2015 Mama to Shannon June - 9/29/2020 👨‍👩‍👧 Baby #2 Due June 2023 🤰🏼

Let me preface by saying that I had a baby on September 29th. I had my 6 week checkup on November 10th and I got put back on the pill. He told me I didn’t have to wait for my period so I could go ahead and be protected from pregnancy. I am on my last week of active pills and I have started to bleed slightly. Is this breakthrough bleeding?