Newly diagnosed HER triple negative SCARED

So Wednesday after 6 weeks from first dr appointment I was diagnosed with HER triple negative breast cancer in lymph too! 
Im absolutely petrified, my head is spinning! 
Im just worried my CT scan will show secondary’s as I’ve been having horrendous pain getting worse in my back and pelvis! My gut tells me it’s spread ? I’m trying to be so positive for my 2 littles ones but can’t help thinking the worst. 
anyone else been in similar position? 

I feel the same exact way. I’m 33 diagnosed with tnbc as well. Stage 2 as of now. My biopsy shows no lymph nodes, but my Dr believes it’s  borderline. I have a pet scan scheduled next Tuesday and I’m scared. But my best advice is, I’m scared but my only option is to fight. I’m ready to just start the battle. Good luck to you