Trying through donor artificial insemination

Hi I have an average 28 day cycle and usually ovulate on day 14. I had AI on day 14 and now my period is 3 days late ( I’m on day 31)

I also had spotting very light on and off from Day 20 - 29 with slight cramping, this felt different to my usual period pains though. It was usually tiring pink and brown watermarks in a panty liner and two very slight watery red marks when I wiped twice that never happened again.

Now day 31 I’ve started getting very thin CM with a creamy almost peachy colour to it.

I’ve tested with different tests on day 27-28-30-31 but not even a slight line and a dr did a urine test to check for infection in my urine on day 30.

Has anyone had any experiences like this and been pregnant?

I don’t feel like I have any symptoms other than tiredness and tender breasts ( which are usual for me)