September.29.2011
October.30.2011
November.06.2011

Did you have a period October 30 and then again November 6?
Are these the start dates of your last periods?

Generally you will ovulate about 12-16 days before the next period is due, but some women will ovulate sooner or later and that can be the norm for them.

Going with dates only gives you a starting place. It can help to watch for other possible signs of ovulation as well.