Spotting 9 days before period due?

Hi guys! My husband and I have been TTC for a couple months and just started preseed this month. My cycle started on the first and according to glow my peak ovulation day was the 17th. Wellll my husband and I both had a HORRIBLE stomach flu so we obviously couldn’t bd on the 16th or 17th. But we did bd every day for 5 days prior. I woke up this morning and had some brown spotting when I wiped but nothing in my underwear. Af isn’t due for 9 more days. Do you think this could be implantation bleeding? Or is my cycle maybe messed up somehow from the flu???

Hoping it’s implantation bleeding! Babydust to me and others TTC! 💕