a week late for my period and seem to be having nausea soft slightly tender breasts so I am wondering if it is possible test negative in home pregnancy still pregnant?

Yes, it is possible to test negative on a home pregnancy test and still be pregnant. This is because home pregnancy tests detect the presence of human chorionic gonadotropin (hCG) in the urine, which is a hormone produced by the placenta during pregnancy. However, hCG levels may not be high enough to be detected by a home pregnancy test until several days after a missed period. In some cases, it may take up to a week or more for hCG levels to reach detectable levels.

If you are experiencing symptoms of pregnancy but have a negative home pregnancy test, it is recommended that you see a doctor for a blood test to confirm pregnancy. A blood test can detect hCG levels earlier than a home pregnancy test, and can therefore provide a more accurate result.