I felt a little bump or knot in my uterus what is that am i pregnant?if so the test said negivete

Bumpy uterous: It is unusal for one to be able exactly identify a bump in their uterus. If the pregnancy test is negative, and repeat tests are negative then you most likely are not pregnant.

HPT: Feeling an irregular surface when palpating the abdomen does not mean that you are pregnant. Have you missed a period? If yes, when did you take the pregnancy test? If you took if right when you missed your period, you can consider repeating in a week, if you still haven't had your period.