Could my diagnosis be wrong?!

I recently had a colposcopy and 2 biopsies which came back CIN 2 & 3 so awaiting LLETZ treatment. I am just wondering if it's possible for a diagnosis to be wrong as I am experiencing lower back pain, abdominal pain, leg pain and a foul smelling discharge and I know these are symptoms of cervical cancer so I am now worrying! Has anyone ever had a wrong diagnosis?