My due date was june 1 2010, is any posibily i became pregnant on august 15 2009 or before? my lmp began on august 29 2009 not so sure date

Nope: Based on both your last menstrual period and your due date, your approximate date of conception would be september 9. Your question about august 15 is about three weeks off. If you delivered on june 1st, and if you had conceived on august 15th, the baby would have been a 43 week gestation. That should have been detectable upon examination of the placenta.