Short cycle, when to start testing.

L • Mom of 2 boys. MC. unexplained secondary Infertility. 3 Failed IUIs. IVF cycle started April 23.

I know it's an Evap line. I hate these cheapies.... I'm 8/9 DPO depending on FF or Premom &Glow.

When would you start testing? I have gotten pos at 8DPO with my last but he was a twin until 6/8 wks. My cycle will start in 3 days as my cycle is only 24 to 26 days. Do you wait until you're at AF due day?