what?? help? confused?

💗love my girls❤️
So ladies I was wondering if u could offer a little help! I've been <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a> as had d&c 4 weeks ago! And on the 19th I got my peak smiley from a digital blue but the line wasn't very dark!! Then this morning I got a low fertility circle but my line was a lot darker than the one that said I was ovulating??? How can this be?