Conception Date/Due Date after D and C?

I just took a third pregnancy test and it came back with a faint second line! Yay! I just had D and C on April 9 so I cannot gauge my due date from a missed period (correct?). I have 4 possible conception dates - April 23, May 2, 5 or 7. Does anyone know if the week of May seems possible for a conception date or do you think April 23 is the one? April 23 is exactly two weeks (ovulation) after the D and C. Any help would be amazing! Thanks up front :)