I have irregular periods. AF comes every two months. I believe I'm having issues with ovulation. I've been using OPK's and they're not quite as positive. The test line is very visible, but not quite as dark as the control line. I've read a few things online about trying to chart BBT. I just went out and bought Preseed and I'm considering buying FertilAid as well. Does anyone have any suggestions/feedback please?