Hi,
You could take a urine pregnancy test at home with one of the kits that can be purchased at the local
pharmacy.
The timing of the test is important for it to be accurate - it should be done AFTER a missed period - from
what you say, i gather that you have done before your menstrual cycle begins.
'False negative readings can occur when testing is done too early. Quantitative blood tests and the most
sensitive urine tests usually detect hCG shortly after implantation, which can occur anywhere from 6 to 12
days after ovulation.
False positive test results may occur for several reasons. These include: errors of test application, use of
drugs containing the assay molecule, and non-pregnant production of the assay molecule.
Spurious evaporation lines may appear on many home pregnancy tests if read after the suggested 3–5 minute
window or reaction time, independent of an actual pregnancy. False positives may also appear on tests used
past their expiration date.
Some diseases of the liver, cancers, and other medical conditions may produce elevated hCG and thus cause a
false positive pregnancy test. These include choriocarcinoma and other germ cell tumors, IgA deficiencies,
heterophile antibodies, enterocystoplasties, gestational trophoblastic diseases (GTD), and gestational
trophoblastic neoplasms (GTN).'
http://en.wikipedia.org/wiki/Pregnancy_test
It would be advisable to consult your doctor about the symptoms you are having to rule out any other cause,
wait for your menstrual cycle - and in case you have a missed period - get a repeat urine as well as blood
pregnancy test done.
http://pregnancy.about.com/cs/pregnancytests/a/hptaccurate.htm
Let us know if you need any other information and post us about what your doctor advises and if you have any
other doubts.
Regards.