hcg levels help

Erica
Can someone please ease my mind according to glow on 9-10-2016 i was 5w 3 days
On 9-13-2016 i was 5w 6daya and these Re my hcg levels they saw a sac only should i be worried that ill misscarry
9-10-2016  my hcg were at 495
9-13-2016 my hcg were 715