First beta hcg done on 11/08/08 is 1270 Second test on 13/08/08 is 2266 Third test on 15/08/08 is 4167 Fourth test on 19/08/08 is 10525 Ultrasound on 16/08/08 show gestational sac, which says it is slightly irregular and measured 7.8 x 5 x 4.5 mm (Mean = 5.77) and yolk sac measured 3.3 mm with no fatal pole. Next scan scheduled on 1st Sept 2018. Should I be worried? Or this can still be a viable pregnancy? Please help!