Warning! Implantation bleeding? Pregnancy spotting?

AF was due today, but she always comes in the morning. I just got this (almost 9PM my time) and there isn't any more as of now. I have had tons of pregnancy symptoms but negative tests. I am on meds that make urine tests negative (diuretics). If AF is a few days late, I will go get a blood test. Is there still hope? Normally when my period starts, it's bright red and in the morning. Baby dust!