Light spotting 8,9,10dpo...(NO PICS) Negative teat 10dpo, is it too early?

Ma

I had a little brown spotting at 8dpo and 10dpo(today). It's only when I wipe. I also had a little red on 9dpo during a pap/gyno exam. I'm thinking it could be IB since I never spot mid cycle. Period is due Saturday. I did confirm ovulation.

My question is, shouldn't my tests be positive by now if it's IB? I have had a faint line that is so light I can't count it as a positive. Anyone experienced this?