This is interestting and makes sense to me at least, it fits with my dates etc
https://www.womens-health.co.uk/chemical.html
The only real sign of a chemical pregnancy is rising hCG levels. For this reason, many women don’t even recognize that they may be experiencing a chemical pregnancy or miscarriage.
Women who have experienced a pregnancy before, may recognise typical pregnancy symptoms including:
breast tenderness
morning sickness and nausea
fatigue
These physical symptoms disappear by the sixth week of pregnancy and your period begins. Your period may include the following symptoms:
small clots in the blood
increased amounts of blood
more severe cramping
My symptoms vanished around what would of been the 6th week, and i also didn't know HcG contines to rise until then, which is probably why mine is dropping rapidly now as period due soon, and why i have not passed anything.
Think i will definitely wait and see