Is that even possible?

December period was late by 1 day. But spotting (pink from my vagina) when I pooped, only happened 2 days before I got a full bleed. Then I only fully bled for 5 days and spotted an additional 3.

Then 9 days later is the only day I observed ewcm. Then the next day, 1 cramp on the R ovary. And cramps & ovary twinges here and there the following week (this week).

Today im 3 weeks and had the most severe type of cramps (no pain just tolerable pressure) which is believed to be implantation according to my apps.

Normally my periods are predictable like clockwork & last 7 days & come like on cycle day 31-33. First starts as light then as that 1st day goes on, it picks up. Spotting brown usually starts day 6. So December period was totally unusual.