Sex everyday and no BFP?

Hi! So me and my SO have sex pretty much everyday. We might miss a day or 2 in a week but mostly it's everyday. We aren't necessarily trying to get pregnant but we also aren't doing anything to protect it from happening. Ever since I've been off Bc (about 11 months) my periods have been about 40 days, consistently, so I don't know if that's my new normal or what. So I've been having unprotected sex for about 6 months now and I haven't gotten pregnant, which worries me. Do you think there's an underlying issue such as PCOS or other infertility issues. Has anybody else been in the same boat and concieved? Thank you guys!