Beside myself

I am frightened I am going to die young. I was diagnosed with stage 1b vulval HPV independent cancer in March. I had clear scans. 1 day before the sentinel biopsy I found a lump. I escalated this to the dr but he said I was still node neg and proceeded with the SLNB. On the morning of surgery I was told I had a 2cm lymph node. I had a bilateral lymph node dissection. I am expecting the worst.