Thank you but i just wanted to know could you get a positive pregnancy test even with an earlier pregnancy test?

Blood test for HCG level is the test that turns positive the soonest of all the available tests. Nevertheless, it takes about three weeks from the time of fertilization of the egg for the embryo to make enough HCG to provide a reliable test result.

The answer assumes the question was meant to ask if a pregnancy test can eventually turn positive after a previous negative one and the answer is yes providing the negative test was done in less than 3 weeks, details in Dr Singh’s answer.