Need advice! I have longer cycles (average 36 days) I know the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> is usually wrong with ovulation date so I have been using opk test strips to find when I’m ovulating. The lines have been pretty light or not at all and I know that the one this morning isn’t positive but it is much darker. Does it seem I might ovulate soon? Does anyone else have trouble predicting their ovulation?