Thanks for the query.
may not detect early pregnancy.
So if you are having irregular periods
lengthier cycles there is possibility of pregnancy.
As you told that your lengthier cycle was 34 days, better to add two weeks for that and go for ultrasound again.
If not you can go for blood test
for pregnancy, which will rule out the possibility.
Sometimes after taking progesterone
pills, it will take around one week for onset of withdrawal bleeding.
So better to wait for one week.
For more details you can ask me directly through the premium forum.