Brown spotting for days

Has anyone ever had brown spotting for a week or more before period? I normally have 30-32 day cycles but this month I started spotting at 27 day. I thought my period arrived but it was spotting day after day. I’m TTC for 5 months but this doesn’t seem like I conceived. I know I’m fine because I just got checked a month ago and I was clear. This spotting is making me stressed now. It’s been 8 days. Here’s my cycle chart due ref