What’s going on???

I started testing with Clear Blue Advanced OVulation rests. And I had 4 days of high. Then my peak. Then it went back down to low. Well now suddenly I took one this morning and it said low. But now I’m getting high results. But I already ovulated and I’m having no sign of ovulation. Could I be pregnant? Or does anyone have any advice? I should be 5-6 DPO now.