So for the last 4 days every morning when I wake up I’m so nauseous it’s ridiculous and it happens…

So for the last 4 days every morning when I wake up I’m so nauseous it’s ridiculous and it happens some times through the day. I ovulated late in July I took a test I can see a vvfl but I’m supposed to be in my fertile window I took an opk and it was very positive god I just wish I knew what was going on!!!