4 days late

Sami

4 days late and still no AF. Negative pregnancy tests every day. Used clearblue advanced all month and I’m not sure I ever ovulated because I never got a solid smiley. Baby danced like crazy regardless. I hate getting the negative, every month. Have an appointment with my OB next month to get checked out if I don’t ovulate again this month. Has this happened to anyone else before? What was the cause?