D.B.
It is also possible that your "period" at 6 weeks wasn't really a period but another bout of lochia. I was breastfeeding exclusively and thought I had started getting my periods back already at 6 weeks and was really bummed. The midwife suspected that it was just more lochia. She was right. Still it would be hard not to be paranoid, especially if you are not nursing. I would have to do a test just to be sure....