Welcome to health care magic.
Period may be delayed with several reason like more tension or anxiety
, hypothyroid, over wt, ovarian cyst
, alternate eating habit resulting in hormonal
As your 4 preg tests are negative,then no need to be much worried.
Take plenty of fluid,empty bladder in time,maintain hygiene of genitals,wear clean cotton underwear to avoid bladder infection.
Take healthy diet,sleep well,do light exercise.
I think you much benefited.
All the best.
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