I can understand you are frustrated and in pain.
What I would like to say before commenting is that, cervical cancer
is a hormonal
dependant condition as well. It strives on certain hormones, so doctors usually prescribe medication to reduce certain hormone levels. These hormones in women are directly related to maintenance and growth of bones. This drop in levels can affect the bones and also result in the excruciating pain you are experiencing.
Another possibility could be the pressure that your reproductive system, that is currently experiencing an infection with resulting inflammation can put on the surrounding structures.
I would advise a bone density
) and a transvaginal ultrasound
(TVS) which would both help in realization of the exact cause.
Visit your doctor who will further help and guide you through complete relief of your symptoms. Please avoid pain killers unless really required.
Hope this helps.