CD6 & dark opk

I was on BC for 15 years and just started my second cycle off of BC (Nuva ring). AF started 10/28 and ended yesterday. Today is CD6 for me and I took an OPK this AM with FMU just to see what would happen. I know this isn’t a positive, but it’s pretty dark! Anyone think it’s possible I’ll ovulate in the next few days? Just seems so early in my cycle. I also had some spotting today.