I've been having a white creamy discharge for 12 dpo. I've read in the book "What To Expect Before Your Expecting" that if your cervical mucus last past ovulation that you are pregnant. Is this true, or a myth?

Some women will notice a whiter discharge in early pregnancy... however, pregnancy is only one possible reason for a changes in discharge. Try a pregnancy test or wait until when your period would be due and test at that time.