Me and hubby have been TTC this month. I’ve been tracking AF for several months on glow. According to the app I was supposed to ovulate Friday/Saturday. I’ve been taking ovulation tests every a.m. and p.m. since last Wednesday, all have had a faint line but not the same shade or darker than the line you compare it to. My CM has a fertile texture to it, I entered the info on the app for the no surge tests and it has moved my fertile window to Wednesday and has me ovulating tomorrow/Tuesday but I still have negative tests. What should we do as far as BD, and are the tests ALWAYS correct?