Implantation? Discharge? Where is my period?...

Is it possible to have implantation bleeding/discharge 10 days after your last period( period being 30th Oct-3rd Nov)?

I had a 2/3 day discharge from late afternoon on the 14th November which started off brown and the 2 days that followed it was pink and very very light in flow

My AF was due 3 days ago, I’ve taken a few tests but all have been negative!

I’m experiencing breast tenderness, headaches, back ache, major bloating, extreme fatigue etc.

I’m so confused, I’m already a momma, but this couldn’t be more different!

I’d love some proper advice, if anyone’s experienced this etc.

Thanks in advance x