Thanks for query,
As your home pregnancy
test shows negative result there is no possibility of pregnancy or even ectopic too.
You have delayed period.
Delayed period occurs due to hormonal
Hormonal imbalance is due to stress anxiety,late night working hours shift duty,or due to ovarian lesion.
If you have a too much stress for extopic you should go for ultra sound
of pelvic cavity
to rule out it.