HCG? Still in body?

Would I still have HCG in my body after a D&C; on December 14th? I got my period about 4 weeks later on Jan. 9th. And I decided to take a pregnancy test today and got a very faint positive. What do you all think? It’s been 6 weeks. I never got my blood tested after a D&C; so idk. What are your thoughts/experiences? Am I pregnant again or not?