Trying to figure out the timing

I should have paid more attention in health class in high school. Unless it's been that long(2002) and my memory isn't good 😂 I know that it's all about timing the days just right. Which I thought that we was doing but after 17 months apparently not. My boyfriend is healthy in that area, and so far I'm healthy in that area. I went in for an ultrasound on New Years eve and everything looked good. The only thing I didn't like about getting an ultrasound was the full bladder. At 1st I thought that 32oz of water wasn't enough, but it was more than enough.

My 1st time using opk and Pre-seed