Hey LG,

Don't apologise for having a vent yesterday! We all need to get things off our chest sometimes.

I knew I O'd on CD21 because I had an ultrasound on CD13 and CD16 to check my follicle/s, and then I continued to chart my temps and check my cm, cp and I also used OPKs. So all of that was able to tell me when I O'd.

Sounds like what your gyno is referring to is a laparoscopy(?). I haven't had one of those but I think there are quite a few girls on BB who have. I think the use dye to see if your tubes are clear.