HI, thanks for using healthcare magic
Pregnancy tests detect HCG hormone. This hormone is normally detectable by day 11 to 14 after conception.
If the test was done after this time, then it is likely accurate and you are not pregnant at this time.
If this time has not passed, then you should consider repeating the test at a later date.
There are other causes of delayed period such as : (1) emotional distress or illness
(2)
thyroid disease
(3)physical illness
(4)high levels of a hormone called prolactin
(5)side effect of medication
(6)polycystic ovarian syndrome
If the test is truly negative and you continue to have
irregular periods then you may want to be assessed for one of these conditions. It would require blood tests and physical examination
Imaging of the
uterus and related structures by
ultrasound may also be needed as well.
I hope this helps