So confused?!?!?

Katrina • So my husband and I hve been trying to conceive for about 2-3 years I found out about a year ago that I had pcos ?
So I have another fertility app that I use and it says I should be ovulating today we'll glow said 2 two weeks ago I was ovulating I took an opk then and I was ovulating so today I decide to take another opk test and the test line is faint but if I already ovulated why is it even faint?