testing negative

i've been taking progesterone to regulate periods for a year now the past few months my body has regulated itself and I've been getting them around the 26. I did have intercourse in my fertile window according to the app period Is eight days late took my progesterone as prescribed this month started on the 20th. Take for 10 days at bedtime. Will start 3 to 4 days after last pill. Still did not get a cycle and testing negative.