These are my last 3 tests, yesterday morning and evening and this morning. I am currently on CD20, was estimated to ovulate between CD12 and 17.
I know all of them are negative but yesterday was the first time any sort of line showed up so I assumed I was getting close but then today the line is lighter than it was yesterday. Does this mean I may already ovulated? Or am I going to ovulate so? Or just what??? 
I don’t really understand the tests tbh and if they don’t work for us this month I’m not going to bother again as they stress me out.