First of all, you should undergo one blood test
for beta hCG to rule out pregnancy
. Early pregnancy test is NOT significant.
In exclusion of pregnancy, other reasons of delayed period are ovarian cyst
, hormonal imbalance, stress/ anxiety, thyroid problem, wt gain/extreme loss, irregular eating habits etc.
Do some investigations to rule out underlying pathology like USG lower abdomen, thyroid profile & other hormone assay etc. Regarding this, you consult with your doctor to take suggestive measures.
Avoid stress/ anxiety, take healthy diet with iron supplements
, control body wt and need adequate sleeping.
Take care yourself.