Stange Period/ Implantation??

Hi I am starting what I think must be an extremely early period, day 20 of a usual 27/28 day cycle. TMI but I woke this

What are the most frequent symptoms after an embryo transfer?

Implantation or just strange period?

Implantation Bleeding vs. Period: How to Tell the Difference

Watery Period Blood: Is It a Sign of Pregnancy?

Germinal Stage CK-12 Foundation

Implantation Bleeding vs. Period: How to Tell the Difference

implantation bleeding mistaken for period

What Is Implantation Bleeding? Symptoms & Timing

Period or implantation??? - Trying to Conceive, Forums