Multiple days positive for ovulation

Brianna • 26. Married. Happy. TTC #1. 1 miscarriage, 3 failed IUIs. Male factor infertility. Starting IVF Summer 2020. Foster mama.
I had 3 straight days evening and night with the LH surge test line darker than the control line. Is this normal? Then today, I have no surge or test line at all! I just don't know if you can have multiple days have positive ovulation tests.