I'll suggest you redo a pregnancy
test by dosage of beta hCG
in blood. At times hCG levels in urine can take time to present and so makes urine pregnancy test unreliable. If the test comes negative, i'll suggest you give it some time you are probably having irregular menstruation
, that will come back.
The symptoms you are presenting look like those related to pregnancy. A pelvic sonography
will be very well indicated in this situation.
Also, you might conducted the test wrongfully. So you can go to a health facility so that you can get tested.
Hope ths helps