Thanks for writing to us.
If the ovulation sticks have come negative everytime, then pregnancy
is unlikely. The delay in your periods is likely to be due to a hormonal
imbalance. You need hormonal tablets of synthetic progesterone
to have a withdrawal bleeding.
I hope this information has been both informative and helpful for you. You can consult me again directly through my profile URL http://bit.ly/Dr-Rakhi-Tayal
Dr. Rakhi Tayal