Disclaimer: I have NEVER had ovulation spotting in my life

Today at 6:00 am when I went to pee, I wiped and there was EWCM with light brown spotting mixed with it. I wiped again and ever since I haven't had any sort of spotting.

It confuses me because my opk tests are still negative but I have ovulation symptoms like nausea and EWCM and I am having acne break outs, so I guess I need some insight.

When I was pregnant with my son I had implantation bleeding. I tracked my cycle exactly and also had it confirmed but it was light brown and the spotting this morning was too. I know it's not implantation bleeding because I am on cycle day 13 and my period lasted for 9 days and all my opk tests have been negative.

Any ideas? 😐