Implantation or Aunty Flo-hoe ??

I’m currently 9dpo today. Maybe 8dpo, it was a weird cycle. My OB asked me to take a blood panel around this time so yesterday I went for it. HCG levels returned <2.0, negative.

This morning I had brown discharge , a little in my undie but more so when I wiped. Was it too early to do labs? I’m abt 8-9 dpo today. Is implantation bleeding a thing?