My husband and I have been using the pull out method since our son was born May 2016.. we have had sex a lot this month and to the best of my knowledge we have used the pull out method correctly. I know it's not 100% effective but what are the chances of really getting pregnant using it? I have been cramping the past few days and my periods have usually been coming every 35 days.. which would make it due next week. What are the odds I could be pregnant?