My menstruation has been postponed for 8 days, and I have not been pregnant with test papers.

Generally speaking, if women usually menstruation is normal, after sex life menstruation delayed eight days to consider pregnancy. At this time use test paper detection if not pregnant, may be because of less days of pregnancy, hormone secretion in the body, so detection can not come out. Suggest to wait a week later to test or go directly to the hospital for blood diagnosis.