I did a transvaginal ultrasound and it turned out ...

I did a transvaginal and the result left little fluid in the uterus (serosity? Or blood content?) Does this mean that I am pregnant or not? I took the test and gave false negative will it be able to take away my doubt? And I take the injection every 3 months, thank you !!!
Expert answer:

The result of the transvaginal ultrasound says that there is little fluid in the uterus, there is no pregnancy at this time (this test only detects pregnancy from 5 weeks of gestation).