Thanks for the query to H.C.M. Forum.
As you mentioned in your query that all tests as, blood , urine , ultrasound
are negative for pregnancy
. I do agree that you are not pregnant.
The period is one week late .
The reason of this amenorrhea
may be as,
1 Due to ovarian cyst
as PCOD is the most common cause of amenorrhea. Diagnosis can be confirmed by ultrasound of ovaries.
2 As you were in E R due to cyst rupture , so many drugs were used for treatment . As these drugs ( few of them ) may be responsible for delay in menses. So for this don't do anything , just wait for menses.
3 May be hormonal
imbalance but for this get in blood for estrogen , androgen , F S H / L H ratio.
In my opinion first of all wait for another 7-10 days for menses , if not , then consult a gynecologist and get his opinion .
Good luck. Dr. HET