Thanks for consulting us.
If your habit is of regular periods & this period is late or very scanty then there may be a chance of pregnancy
, although this is very remote in the presence of a negative pregnancy test & negative ovulation test.
On the other hand if you have a history of prolonged cycles then it may just indicate another prolonged cycle.
Surest way to rule out a pregnancy is to do a blood pregnancy test & a pelvic ultrasound
Wish you good luck.