Hi ! 
I had my last period from february 23rd to 27th.
I took an ovulation test and I ovulated on march 5th.
Yesterday (12dpo and 1day till AF) i had a pregnancy test and I saw a veeery faint line (photo taken 5min after taking the test).
This morning (13dpo and AF due today) I took another test (digital clearblue “+ or -”, 25ui) and it was negative “-”.
I am supposed to start my period today, I am very regular (24days cycle), and still nothing, besides some very very light brown discharge.... what do you think ?
Thank you !