Am I infertile?!😱😱

My husband and I have know each other for 3 years. We’ve been having sex for 2 years. While we were dating and he’d cum inside me we’d always get plan B (3x only) to prevent babies. However now that we are married, we do not use any protection. We are not attempting to conceive however he does cum inside me quiet a lot and yet I am still not pregnant. I just started my period today (it was more than a week late. Some apps said 12 days while others said 8days late) after he had been cumming inside me for the last few days. Am I infertile? I’d like to have kids in the future but I’m worried that whatever is going on now will prevent me from conceiving... please help me understand what is going on!