Need an Opinion Please

Hi everyone! My hubby and I are going to start trying to conceive this month! I'm excited and nervous. I've been on birth control pills for 4 and a half years, which I've heard can take my body some time to get used to ovulating again. We are ideally aiming for May due date at the earliest (I'm a teacher), but figured we'd start trying a couple months earlier because of my body getting used to everything. He's nervous that we are going to conceive the first month trying, and I'm just wondering what the likelihood of that is. I know it's different for everyone, but I'm just trying to get some thoughts. He wants to hold off another couple months, but I don't have any more birth control pills. I'm jut trying to see if anyone has any advice to offer me? Thanks!!