Line Help ??

Marissa

I had a DnC August 30. I had blood drawn on oct 10 and my hcg has dropped to a 7 , I started my period the 9-11 , which is a normal cycle for me . I tested positive w an opk a week ago , but I’ve been feeling blah and tired and my boobs are sore I had a hcg test and took it not expecting to see anything . Is there a possibility that this is from leftover hcg even tho it was at a 7 almost 3 weeks ago ?