Good self-esteem can be a challenge for most women at the best of times. Very often self-esteem can be affected by body image. Breast cancer can lessen a woman's confidence in herself and her ability to cope. Try not to define yourself by the way your body looks or to blame yourself for getting breast cancer. You did not cause your breast cancer.
Social workers and psychologists who work with cancer patients are trained to help women who experience these feelings. You should feel comfortable to contact them for an appointment as this is a normal part of your treatment and cancer recovery.