TW- No confirmed PT but could this be an early miscarriage?

For context: I had a miscarriage and D&C in July. Started birth control mid August. Broke my ankle, needed surgery, on 9/12 in the pre-op they believe there were faint positives in urine tests but blood test came back negative. 9/14 started spotting that progressively got heavier. I stopped the birth control this past Sunday as my moods and emotions were very affected by it and my husband and I opted to use other contraceptive measures. Assumed I was starting my period as the spotting just continued to get heavier to the point of needing tampons. Passed this last night. That is the first time I have been on birth control that long so I am unsure if this is something to be expected when coming off of it. I was taking Seasonique which is dosed as 12 continuous weeks on and week 13 is the placebo pill. I stopped in week 8.

Thoughts?