Suggest Treatment For Irregular Periods

Hi, I am 27 years old. I've had irregular periods since puberty. My first two periods were 6 months apart. Ever since it has always varied between 45 days to nearly 87 days. I did get this checked with more than a couple of GYNs and they ruled out PCOD or any other problem. They said that it was natural since my mother also had irregular periods (45 days) I have been married for 6 years and we have only begun to think about conception. I have two questions (a) is it ok to just try without regulating my periods (b) how should we try before I begin to check for fertility problems?