Slow rising Beta Hcg, Any Success Story?

Hi semua. Nak tanya ada x sesape di sini yg hadapi slow rising beta Hcg tapi went on having succesful pregnancy? This i my Beta Hcg Results: 26/8 - 4888 28/8 - 6224 I'm around 5-6 weeks. No bleeding,cramp so far. Last Ultrasound last week shown a gestational sac. Now i'm Worried. Beta hcg korang macam mana?