Bleeding days after period??

My period was very heavy for 4 days, and then spotting for 2 days. I had no bleeding or spotting for 24 hours on day 7, but now I’m back to bleeding/spotting brown. I’m on day 9 of bleeding, and day 12 since my actual period started.

This is the first time this has ever happened, and I’m so confused!! Has this happened to anyone else?