Hi.
Thanks for your query.
Noted the history of delayed period with
severe pain in abdomen feeling sick, comes in waves, wanting to vomit, wants to know whether this is flu or to do with periods...
Since your history is of missed periods with the severe pains and
nausea, the first probable diagnosis that comes to mind is tubal
pregnancy with rupture.
Hence I would advise you the following:
Rush to ER for urgent urinary pregnancy test.
Ultrasound of the abdomen to know the cause, whether ectopic pregnancy or something else as the ruptured ectopic pregnancy can be a life threatening condition.
Other tests of blood to see for
anemia, kidney function and so on as per the clinical picture.
You may need an urgent operation to save from complications.