Could you be pregnant if took a pregnancy test the day your period was due it negative still havent had two days later but have sore breasts and tiny spotting?

While a negative pregnancy test result on the day of your expected period can indicate that you are not pregnant, it's important to note that pregnancy tests are not always 100% accurate, especially very early in pregnancy. There are several factors that can affect the accuracy of a pregnancy test:

The sensitivity of the test: Different pregnancy tests have different sensitivities, which means they can detect lower levels of hCG (the hormone produced during pregnancy) in your urine. Some tests are more sensitive than others, so if you took a less sensitive test, it's possible that the hCG levels in your urine were below the detectable level.

Timing of the test: Pregnancy tests are most accurate when taken after a missed period. If you took the test exactly on the day of your expected period, it's possible that the hCG levels in your urine were not high enough to be detected yet.

Other factors: Certain medications, medical conditions, or recent pregnancy can affect the accuracy of pregnancy tests.

Given that you're experiencing symptoms such as sore breasts and spotting, it's still possible that you could be pregnant. If you haven't had your period within a week of the expected start date, or if you're still experiencing symptoms, it's recommended to take another pregnancy test or consult with a healthcare professional for further evaluation. A blood test can provide more accurate results earlier in pregnancy compared to a urine test.

It's important to discuss any concerns or questions about your pregnancy status with a healthcare provider, as they can assess your individual situation and provide appropriate advice or further tests if necessary.