pregnant or just birth control?

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Long-ish post just read it and give your opinion if you can.

Okay, chemical pregnancy-positive on 9/9, started spotting 9/10, bleeding light, but dark and small clots 9/11-9/12, no blood 9/13, spotting 9/14.

I started the mini pill (Nora-BE) on 9/11. Repeated pregnancy text the following week 9/20. It was negative.

Fertile week predicted by Glow as September 19-25. Although idk if i truly ovulated? Since i started the mini pill.

Had unprotected sex on September 26th, he finished inside.

I’m having slight breast tenderness, lower back pain, slight nausea when i woke up today, bloating, fatigue.

But i am unsure if this is caused by the pill or not. I have never been on the pill before.