Tanong ko lang po , last mens kopo is August 18-24 then umuwi po hubby ko ng august 28 Yesterday po

Nagpa trans v po ako , nakita po 8weeks and 1 day npo baby ko . Based on my calculation , I’m already pregnant august 25 if trans v ultrasound is accurate age of a baby po . I just wanted to know po if accurate poba ang trans v ultrasound?? As age of a baby . If august 28 po ako nabuntis , 7weeks and 5days palang po dpat sya yesterday. Tia po