Implantation bleeding experts!

I never experienced IB with my previous pregnancies. This cycle I was using opks and we times bd well with ovulation. I had spotting yesterday, very light mixed with creamy cm. Its gone today. I'm 11 dpo today. I'm expecting my period to start on the 22nd like every other month and this lines up with when I suspect I ovulated based on opks. That's in 3 more days so I'm hoping what I experienced yesterday was IB at 10 dpo. I'm having some very mild cramping. I'm looking for some expert opinions. I shouldn't expect a positive if it was IB until tomorrow at the earliest right?