Subur atau?

salam momsies semua, im using this apps to easily track my ovulation. is it accurate? saya jenis regular period. harini 15th sept baru cd12 but double line? (first cd12 result pukul 0730pm) can help me? is this the right time to bd or hv to wait until the result came -ve again? mohon pencerahan yaaa semua ☺️#bantusharing #1stimemom #answerpls