freaking out!

my pcp did a quick hcg and gave me an ob referral. i got it back today and it was 622, she said it looks like i’m between 2-4 weeks pregnant, from my last missed period i should be at 5 weeks 3 days. am i going to miscarry? i definitely ovulated the 15th of march because i was tracking with opks. anyone have any success stories with this? anyones levels under 1000 at 5w3d and have a successful pregnancy? she isn’t testing my hcg again, and i have to follow up and wait for an ob appointment.