Spotting for days.

K • Mom of 1, TTC #2.
Alright. So I'm 34 day cycle been super consistent for a year and a half. This month I've been spotting for seven days now. At first I was excited because it was 6 days after ovulation. But it is still going and now I'm worried. Negative pregnancy test. Why am i spotting? Is this something I should go in for? I recently had a bad 48 hour flu, wondering if this could cause it?