Ummm...When should I....?

DH & I are TTC. My cycle has always been 30 days so I always get AF on the 12 of each month but this month AF arrived early 11/9 (which make it a 29 day cycle for me ) so when should I O this month ? I always use the OPK but I give up cuz it didn't work for me. So please help ladies.
TIA

Re: Ummm...When should I....?

If you got your period on 10/12 and again on 11/9 this cycle is 28 days. CD 1 is the first day of "flow". You can use a website like fertilityfriend.com that will take a few months of your cycle and give you a calendar of when you might o. If your LMP was 11/9 to day you are on CD4. Some girls BD start bding CD8 every other day until they "O" which "usually" is CD 14 but is different for a lot of us!

Good Luck