when did y'all start ovulating after baby?

I stopped nursing a month ago, but I haven't had a period yet even though my birth control says I should have. I took a pregnancy test and it's negative, so it's not that. We're wanting to start trying for baby #2 in May, but I haven't ovulated yet. I'm nervous I wont be able to ovulate by the time we're ready to try. How long did it take people to ovulate again after baby and nursing? (I'm going off birth control at the end of this pill pack. Y'all think that would help?)