Doubling?

brooke

On 7/30 I got my first positive test and immediately scheduled my first prenatal appointment. I had a chemical a couple cycles back and I was worried so to ease my mind I paid to have my hcg levels drawn on Friday (8/2) which were 127

Today 8/5 my hcg levels are 331

By doing the math of 127x2 = 254 + 127 for today it should be 381. Since it wasn’t 2 days it did double but should it be 381 or higher? Does that mean I’m not doubling?

I trust my drs and I hope I’m just overthinking the numbers!