My next period is on the 12 of this month and my fertile window was on 29 that is from 24-29 of last month , when can i take a pregnancy test and it will be valid ? will i take it on the 12 and be rest assured with the result?(32 days for my cycle?

Tests are accurate: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, or medications. A correctly done urine test gives a reliable result by 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon.