What does it mean if at 5 weeks 3 days my hcg was 7533 and now at 6weeks 3 days its 17806? is that good?

Sonogram: The HCG levels are less important than the sonogram findings. At 6+ weeks your doctor should be able to see a fetus with a heart beat to verify that all is progressing normally

Good: beta hCG's double every 2 to 3 days normally.

Borderline: In early pregnancy, the HCG level should increase by at least 50% every 48 hours. So your results are borderline. I would suggest you get an ultrasound when you are 7-8 weeks to make sure everything is ok. Best wishes!