Help Please!

Thursday at 4pm- super faint line

Thursday at 9pm- negative

Friday at 1 am- super faint line

Friday at 4pm - negative with a digital

Today at 9am- same faint line as Thursday

I am 4 months postpartum. And had one cycle in Dec, this would put me at 7 days past my period.

Today:

Top: Thursday at 4pm

Middle: Thursday at 9pm

Bottom: Friday at 4pm