HCG Levels

Tracey

So I had my 2nd HCG recheck today and it was 6000 at 5w6d. Thursday is was 3000 at 5w2d. My doctor said its doubling as it should and she feels like its a reassuring pregnancy. I just thought it would be around 12000 today since its been 4 days, but she said once HCG gets over 2000, it takes longer to double and my doubling would be around 90 hours. What do you all think?