Hannah, no you can not: ovulate, not conceive and not get a period. You ovulate, that releases the progesterone rushes, then you wouldn't conceive, the progesterone would keep pulsing cause it's prepping the uterus lining for possible implantation. Implantation wouldn't happen and the progesterone would peter out, estrogen going dominant again and then your uterine lining begins to disolve and shed and AF is triggered.