tests are usually accurate but not 100%. These tests test for B-HCG which should be being produced if you are pregnant. Your symptoms are seen in early pregnancy but can also be with other conditions. There are 2 tests that would be most helpful for determining if you were pregnant. One is a blood test
that actually measures the amount of Hcg in your body, it results as a number, not positive or negative. The other would be an U/S to look at your uterus and to determine if there is a fetus (baby) there. If these are negative, then it is possible you could be having some alterations or abnormalities in your hormones (estrogen
) making your periods irregular and mimicking pregnancy symptoms or there are other issues such as thyroid
problems that could also present with these symptoms.
Good luck and take care