HCG Levels?


I had my hcg levels checked Tuesday the 24th I was at 544 I had them checked again Friday the 27th and they were 576. So this is not a double but still an increase. Now I also had bleeding Thursday evening but no cramping and I have no bleeding or spotting since late Friday evening. I am going Monday to have hcg checked again. But how worried should I be? Is this just a sign that I will miscarry? Or is it possible to still have a healthy pregnancy? Any advise would be great