Is this normal ?

I recently got on nexplanon in January, first week of January. My period was late for a couple of weeks until I got it Jan 31, and lasted until Feb 17. On and off. It was really messy, then not messy, then really messy again. Had clots, no clots, clots. It was on and off. It’s finally going away as a I see pink spotting now. Is that normal? Or could that be an indication of pregnancy? I’ve heard a lot of women cramp and bleed during the first weeks of pregnancy. We’ve been active this whole time, and the last pregnancy test I took was before my ‘period’ came and it was negative.