Can't help but wonder

So this may be long .. I have three children from a previous marriage. (12/10/8) I recently got remarried to my soul mate !!😍. He has no previous children so we are TTC our FIRST! I used depo and iud after my last pregnancy 8 years ago. I have been off alll BC for 11 months now and TTC for 4. With all my other pregnancys it just happened right away. But this time it is not. Soooo I can't help but wonder is it me and all the BCs. Or is it him since he has not had other children. I know we are both wondering the same thing but neither want to say it. Any advise or thoughts !