How long do you ovulate for?

Katrina

I’ve been using testing strips since Thursday because <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> said I would ovulate Monday (today). Saturday, Sunday AND this morning I got super positive tests and Friday it was positive aw well, just not AS dark as the others. I took a pregnancy test yesterday just to be sure and it was negative. Does anyone know if it’s normal to have that many positive tests in a row? Could this mean I am pregnant? Thanks in advance ladies!!