Fever with Clomid?

Jessica
Hi all. This is my first round of Clomid. Yesterday I became really nauseated and spiked a low grade fever with chills last night. It pretty much resolved today, lingering nausea and some lower abdominal and back pain, but doing better overall. I'm wondering if it might be a hormone surge and potential ovulation since my opk yesterday was almost positive?? Anybody else experience this?