Can An OPK detect early pregnancy?

Hey lovlies 🥰

I started to use opks this cycle and ended up finding out when my fertile window was. I got my peak on cycle day 13 and pn cycle day 14 the test was still positive. Then on cycle day 15 it was negative. Im 5dpo according to my premom app and today I saw that my opk test was darker than before. I was just testing to make sure I dont get another peak. Please help a mama out it would mean so much! We are trying for baby number two. Baby dust to you all 🥰💛