I'm on primolut n (1x3) and stopped 3 days ago. no sign of period yet. any reason? can i still get pregnant if i'm on the pills? does it matter?

Common: Primolut n is a progestin only pill that is used for several indications including endometriosis and to decrease menstrual bleeding - it is also used to delay the menses. It is not specifically a contraceptive and will not likely keep you from ovulating or conceiving. If you have irregular periods it may not be time - if your periods are usually regular, the do a pregnancy test to rule out that.