Hcg levels low

Hi everyone so on 11/9 I got my hcg levels check they were 40 I was 5 weeks 1 day that day today I am 5 weeks at 3 days I just got call back saying my number are 61 he wants me to go back tomorrow for another hcg test I had 2 miscarriage already just bit scared is happing again has this happen to anybody had successful pregnancy.