Hcg levels - please help

Veronika • TTC for our 🌈 baby

Hello. I was on blood work last Thursday and it was 83 - it was just a day after missed period. Today (6 day later) the level was 227. It's not doubling. I am so scared. It's my first pregnancy and me and my husband have been waiting for it for 2 and a half year. Please tell me. Is it too small increase? Can my little baby still be OK?