This last cycle I had a 34 day cycle. Glow is predicting that I ovulated on cycle day 28, 6 days before my period began. I thought it was rare for women to have a short luteal phase? I used OPKs, tested twice a day starting at cycle day 10. Did not get a positive. I just don't believe I ovulated that late and I want to figure out how to get a more accurate estimate for next cycle. Hopefully it will be easier to get a positive OPK since I'll be starting clomid. Any advice?