Hello dear
I understand your concern
Pregnancy test will give positive result once your period will miss by 8-10 days.
You did test at 5th day of missed period and there is chance of the false negative test
I would suggest to wait for 4-5 days and if period will not come then again go for urine pregnancy test and or blood HCG to confirm the pregnancy.
If pregnancy test and blood HCG will come negative then you have to consult the gynecologist to rule out the other cause of the missed period.
Missed period could be due to hormonal imbalance,
ovarian dysfunction,
endometriosis,
adenomyosis.
Meanwhile avoid stress, take healthy diet, drink plenty of water and do regular exercise.
Take small frequent meal and table
domperidone for evening sickness
Period can be induced by the
progesterone pill in absence of the pregnancy.
Hope this may help you
Contact further if follow up needed
Best regards
Dr. Sagar