Ay sis, ganyan talaga kapag irregular periods especially after injectables, sobrang mahirap i-pinpoint talaga! Based sa ultrasound mo, yun ang mas accurate usually kaya I'd go with July due date, pero honestly para sure and para ma-ease ang mind mo, better ask your OB directly na to confirm which dating sila gagamitin sa medical records mo kasi alam mo yan ang magmatter sa records. One of my friends din had a similar situation with Depo and her OB just recalculated based on the first trimester ultrasound, kaya huwag mag-worry, doctors deal with this lahat ng oras!