I had my first appt at 5 weekds its good to go in early not just so they see the baby but to test for sti's and infections or abnormalities also they can get your beginning weight and run blood tests check blood sugar and blood pressure make one asap what can be bad about that? The sooner the better...
Call and make an appt for when you're 8 weeks. Anytime before that there's a chance they won't see baby on an ultrasound and it will freak you out.