It is completely normal to experience a delay in your period after stopping Progynova (estradiol valerate) early in your cycle. This medication temporarily alters your natural hormone levels, which can disrupt your ovulation and delay your menstruation. Since your home pregnancy test is negative, this delay is very likely just your body adjusting to the sudden hormonal change. Please try not to worry, as your system should reset and your cycle should return to normal soon. If your period is delayed by more than a week, or if you develop severe abdominal pain, it is a good idea to reach out to your gynecologist for a quick checkup.