Hcg levels and ultrasound help!??!!

Se

So Recently I had an obgyn appointment my blood draw was taken on Monday 6/13 , my Hcg levels were 2519 and the second blood draw was on Wednesday and it was 3422. The ultra sound on Monday was dating 5 weeks 2days . My doctor said that it didn’t quite double enough to 3700 but it still can be a viable pregnancy , lately

I’ve been getting nauseous and feeling crampy with no bleeding I do feel like I’m getting more symptoms tomorrow I go for another blood draw … should I be worried this is would be my third pregnancy ( one live pregnancy I’ve only had. ) help😭🥺🥺🥺

The gestational sac was visible on ultrasound ✨✨