Low Rising HCG Levels

LMP was Oct 24th. 1st blood was drawn on 11/27 Beta was 586. Dec 5th- 5,856. Went for US at 7 week mark - found a sac measuring 5 weeks 5 days, nothing else. Blood was drawn on Dec 12th- Beta was 9000 something. Last blood drawn was Dec 14th- 11,000 something. Since it’s rising, they want me to come back in for a US on Tuesday, what i consider the 8 week mark. Ever since my chemical pregnancy July, my cycle has been 30-32 days. I’m hoping i ovulated late and that although levels are doubling, they’re rising. Anyone in the same boat and had a successful, healthy pregnancy? I have no bleeding or cramps. Feel more symptoms now than the last 2 weeks.