HI belle75,

You can buy digital Ovulation sticks, a bit like a pregnancy test, that you POAS and it tells you when you are ovulating by a little smiley face, which is better than you have ovulated.
They cost about $70 for 10 but helped me figure out when we should be having sex. I only went through a couple of boxes and found it was easiest method, especially with a longer cycle.

Good Luck

FC