If i came on my period on the 20 of july but it was drank brown and found out that i was pregnant on august 14 when did i get pregnant?

Hard to say: It's possible that you became pregnant about 2 weeks prior to the dark brown period you describe of July 20th. That would put you at about July 7th or so? The best is to get an ultrasound now as they are VERY accurate in the first trimester. You'll definitely have your answer and be able to pinpoint within a few days when conception occurred after you obtain this ultrasound. Best of luck!

Due: You need to have your due date established first since the brown discharge may or may not have been your period. Once you have that then your doc or one of us can help give an estimated conception. However, its only an estimate. Anymore about the only women who absolutely know conception dates are those getting IVF and virgins who got pregnant the first time.