Vvfl for days

natxo

I’ve had vvfl since Wednesday this week, I thought I ovulated two weeks ago with the cramping and spotting I had but with PCOS it’s difficult to confirm if I even did . But I’ve been having vvfl on pregnancy test I thought it seemed darker or Friday but lighter again today .. I’m worried it’s a chemical or on the other hand maybe I ovulated late and just testing to early ! Did any one have vvfl for days and then go on to have a strong bfp