Am I miscarrying? Or just an abnormal period?

I’m probably not but I’d like an opining or two. So my period was four days late, the first two days I took pregnancy tests and they came out negative but then someone told me that it was better to take a test the week after a missed period. I decided to wait until then but this morning I noticed a little pinkish white discharge. After that I started cramping, probably the worst I’ve ever cramped. My blood was super dark at first and smelled awful. Then it became bright red and I’ve soaked three pads already since this morning. On my first day of my supposed period. I’ve never bled that much on my first day. I also am super moody and sad, which is also unlike me on my period. I peed again and passed the largest clot I think I’ve ever passed. My back is killing me and that’s never happened before. I’ve also been super tired lately. All this is different from usual, and after a four day late period I started to wonder if I could be miscarrying. It’s possible since I’ve had unprotected sex.

Please no criticism, I’m just curious and worried. Thank you.