Thanks for the query.
After taking progesterone
pills sometimes it may take around 7 days for onset of withdrawal bleeding.
If you want to rule out the possibility of pregnancy
better to go for blood test
Which will give more accurate result than urine test.
If the result comes negative you wait for 4 more days possibly by that time you may get withdrawal bleeding.
If you do not get withdrawal bleeding even after that better to undergo ultrasound
which will possibly detect the cause for withdrawal bleeding like poly cystic disease etc, and treatment can be taken accordingly.