pregnant?

Since you are definitely not pregnant, you can take that worry off your plate. (I say "definitely", as I assume you have not had unprotected sex since your doctor's visit, and the pregnancy test was conducted after your missed period, correct?).

Some women can miss a period, and it does not indicate a medical condition. Whether it be from stress, recent illness, change in medication or other "unknown" factor, you may miss a period or two in your lifetime, and that's OK. Since you are in regular contact with your doctor, it is important to notify him/her of any new symptoms that involve excessive bleeding (during your period) or pain. If you are having unprotected sex, it is important to take care of your body and use condoms and other forms of birth control.

Wait until November 4th, and if your period still has not begun, you can wait a week, or call your doctor and ask if you should be seen. Most likely, doctors are OK if women miss a period, or have a late period. If you have three missed periods in-a-row, this is known as amenorrhea (absence of a period) and you would want to have a medical examination. Otherwise...it can be completely normal to have a missed period with no other medical condition.