Thanks for the query.
As you crossed your expected date of periods, check for pregnancy once.
If the test comes negative, the black discharge could be hypomenorrhea
, means scanty flow during periods.
The collected blood in uterus will come out as black discharge, no need to worry about it.
You can continue the ovulation induction
in next cycle and monitor the follicle development with follicular study
. Plan unprotected intercourse
around the time of ovulation which will increase the possibility of pregnancy.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429