Please help??

Good morning ladies,
I have a bit of a problem. Af was due today, however she showed up early 10/21. It was not the regular af. 10/21 was mucus and bright red. 10/22 a few clots and brownish blood during the day. By 2am 10/23 af was gone and I was having severe cramping for about a hour. 10/23 7am no more af. I'm very regular and normally last 4 days. Do you ladies have any ideas or feedback on what might be going on. Thanks
I'm very new to this.