Serious question!

Alexis

So I’m pretty sure i ovulated on the 8th, The day i should’ve started my period. The egg white like cm lasted for 2-3 days then i had thick brown cm then it stopped for a day then it was water brown. Then it stopped again and now it’s light pink. I had a blood test and i had an inner ultrasound done on thanksgiving and there was nothing. Could that be implantation bleeding? Is it possible it could have been too early and I’m actually pregnant?