Miscarriage?

Abigal • Baby boy ❤️ 10/06/22 Baby girls 👼👼03/16/24

So I dont know if this is a blood clot or a miscarriage. But yesterday I thought my period had started but I was bleeding very heavy and that’s not normal for my first day starting and after this past the blood has been light but very dark red. I just need to know if it’s a miscarriage or not and no I didn’t know I was pregnant if this is a miscarriage. Thank you in advance.