Took clomid (clomiphene) last period and had sex for3 days then stopped for a week and then back to sex.i'm 9days late.-ve home pregnancy test.tolerable back ache.

Its possible: Because you didn't have monitoring, it is unclear when you ovulated. Generally a women ovulates between 4 to 7 days after she is done clomid (clomiphene). On the other hand, particularly in women who have pcos, ovulation may have occurred much later, and with "relations", you have gotten pregnant later, but it hasn't showed up as a positive pregnancy test. Crossed fingers!