Trying to conceive

I came off my birth control in November so it's been about seven months. We have not been actively trying until last month but nothing has happened yet. Should I be concerned and go to the doctor to see if something is wrong or should I just keep doing what I'm doing and try a little bit longer before I get worried. We haven't been preventing it this whole time, but until last month we wasn't tracking my fertile week. My period is regular for the most part averaging 29 to 30 days but I can't seem to pinpoint ovulation.