Hi I've been TTC for over a year now so decided to give BBT a go. I've downloaded fertility friend and I think I ovulated on either the 16th/17th based on OPK. FF has put a vertical line for ovulation but no crosshairs. Also if I put a temp in for 17th it doesn't think I've ovulated at all so I've taken that out. Any one have any ideas? Have I even ovulated??