I have a lot of egg white discharge 7. days before period could this mean pregnancy also had tingling in one of my nipples?

Not reliable signs: of pregnancy. Breast tenderness is a common sign of early pregnancy; breast tenderness and/or tingling in nipples can occur in response to the normal fluctuations of hormones during the menstrual cycle. This is also true of vaginal discharge. If there is a chance you are pregnant, you should be taking prenatal vitamins, with at least 1 mg (1000 mcg) of Folic Acid, daily to prevent birth defects.

Not Diagnostic: there are lots of signs that could mean pregnancy but none are diagnostic. The best thing to do is take a home pregnancy test which are very accurate. Best time to do this is 45 days after missing a period.

Discharge: by no means represent a pregnancy. Any breast changes appears before development of placenta is not a sign of pregnancy. You prove a pregnancy by taking a test 7-10 days after missing a period.