Your HCG level must done in Nov and not in Dec.
Sometimes spotting is there. In early pregnancy, it can be implantation bleeding and it's normal. If you don't have any other symptoms like severe abdominal pain along with spotting then nothing to worry.Your HCG levels are good but somewhat on higher side. Higher HCG level can be found if there are chances of multiple pregnancy.
Next Steps
Visit your gynaecologist regularly, Follow their all instructions. Do USG as suggested by your Doctor to rule out single or multiple gestational pregnancy.
Health Tips
Take complete bed rest if spotting happens again. Avoid heavy work.