Fertility vitamins or supplements

If I don't get pregnant This month next month will be one full year of trying. So far the only thing I have done is take regular prenatals and OPKS. So I have taken prenatals for 11 months. For a couple of cycles I used preseed during my fertile week. I tried bbt charting but I work different shifts so some days I work day and then the next I will work nights so it was so hard to keep up and it ended up not being reliable. I have read geritol and seven seas and other vitamins. Are you taking anything and why? I would like to start taking them now as next month for July we won't be actively TTC so by August I would be taking vitamins/supplements for 2 months before TTC again. It just seems I'm doing everything I can. I get a positive opk almost the exact same CD every cycle and I've been consistent for 11 months so I'm ready to try something else.