I have been TTC for a year now. I have failry regular ovulatory cycles w/and w/o clomid, but still no BFP

Even though I am not insulin resistant, I have recently started a low carb diet to see if that helps. I am also thinking about trying PCOS Insulite System or d-chiro-inositol and wanted to see if any of you had any experience with these? or any other success stories?