Congratulations, mama! Honestly, best time to go is as soon as you can kasi the doctor needs to confirm the pregnancy and check kung saan exactly naka-implant, especially since hindi ka sure ng LMP mo, they can date it properly from the ultrasound pa lang naman. A few of us from the mommy group namin went around 6-8 weeks and nakita na namin agad ang heartbeat, which was super reassuring, so I'd suggest making an appointment with your OB na para ma-schedule mo na right away!