I have been trying to use OPKs for about 6 months but I never seem to be able to do it right or catch my surge. I finally was able to take one every day from the end of my last period and it seemed promising. I had three days of faint lines (about half of what the test line was) but then today I tested and got no line at all. What is up with that? It lined up with when the app said I should be ovulating. I am thinking that maybe I am not ovulating and that is why I haven't ever caught my surge and what happened with the test today.

(Also, if it is of any use, my periods are barely 3 days long, sometimes more like barely 2 but my cycle is very regular at ~32 days)