Im hoping im pregnant.

Im patiently waiting for my period to come in 2 days. i been having symptoms in tha first 2 weeks and this week all i had was back pains and cramps. Im not feeling nausea anymore and my boobs dont hurt.. im upset bc i wanna feel tha symptoms bc me and my bf are trying to have a baby. But does anyone know when is tha best time to have sex and possibly come out pregnant?