I completely agree with you!!!
Go by the last day of ur period u normally get prego right after... do the calculation and ull know how far u are but it's just estimated
The truth is u don't know which sex u had made u pregnant. If we knew the day it wud be soo easy n simple
I know it's so very frustrating:-/ idk why they bother giving you a conception date when it can still be wrong... I just want to kno if I got pregnant by sex the day before my period or sometime after:-/