Has anyone had this happen?

My period was six days late (which is weird because it’s ALWAYS normal) so yesterday I took a test and it was negative. Then later in the day my period started and it was like a wrecking ball

So much blood and a lot of clotting. At first it started out where it was just when I wiped, then it was everywhere.

Has anyone else had this happen? I’m just so confused because AF is always on time and usually mild. And I have never had this much clotting or cramping. Being six days late also worried me.

Is this pretty typical? Should it be something I need to talk with my doctor about? I’m just so upset because I really thought I was pregnant this month 😞

Thanks in advance for any advice or opinions