Would anxiety and depression make back problems and shoulder problems worse. Along with stress from having mom on dialysis and dad passed from cancer?

Absolutely. You've identified significant sources of stress--seek professional help to work with you to help you take care of uourself.
Our emotional. Health impacts on our physical health. I am sorry you are struggling with both your fsther's death and your mother's illness at such a young age. It is important that you take care of yourself, too. Consider joining a support group for family members who have lost a loved one to cancer and/ or a group for those helping a family member on dialysis. The hospital social worker may have suggestions.