Participants who have received treatment for early stage breast cancer and who experience fatigue, rated at least a 4 on a scale of 0-10 during the previous week, per patient report. Participants will complete baseline symptom questionnaires, then complete an internet-based cognitive behavioral therapy program (PROSPECT) for 8 weeks, then repeat questionnaires.

Participants who have received treatment for early stage breast cancer and who experience pain, rated at least a 4 on a scale of 0-10 during the previous week, per patient report. Participants will complete baseline symptom questionnaires, then complete an internet-based cognitive behavioral therapy program (PROSPECT) for 8 weeks, then repeat questionnaires.

Participants who have received treatment for early stage breast cancer and who experience insomnia, assessed as difficulty sleeping over the last week, yes or no, per patient report. Participants will complete baseline symptom questionnaires, then complete an internet-based cognitive behavioral therapy program (PROSPECT) for 8 weeks, then repeat questionnaires.

PROSPECT is an internet-based exercise and behavioral symptom management program developed for patients who experience long-term side effects from cancer treatment. The cancer-specific symptom management intervention is intended as a self-management adjunct to improve cancer- and treatment-related symptoms through non-pharmacologic approaches.

To obtain preliminary data about the efficacy of the intervention in this patient population. The investigators will assess change in the participant's primary reported symptom (pain, insomnia, or fatigue) with 8 weeks of the intervention.

To obtain preliminary data about the acceptability and usability of the intervention in this patient population.