My last period was march 13 i took a pregnancy tests on april 10 is it possible i convinced on april 4 or march 28 ?

Pregnancy Test: Home pregnancy tests can show positive as early as 3-4 days after implantation. Implantation generally occurs 6-12 days after ovulation. So if the egg was fertilized right at ovulation and you used the most sensitive home test it could be positive at 9 days. On average it is 13-14 days after fertilization/ovulation when it is positive. So no April 5th is not the day you conceived. Likely 3/27-28