Web-Based Symptom Monitoring and Self-Management Portal (YES) for Adolescent and Young Adult Breast Cancer Survivors

Inclusion Criteria:

* Female
* Age 15-39 years at diagnosis of a stage 0-III breast cancer
* Within 3 years of breast cancer diagnosis
* No known evidence of breast cancer recurrence (local or distant) or second primary breast cancer
* No prior history of new other malignancy since their breast cancer diagnosis (other than non-melanoma skin cancer)
* Able to speak, understand and read English
* Cognitively able to complete the study requirements
* Ability to access medical records from treating hospital
* Willing to provide cell phone number and/or email address, and willing to receive email and/or text messages from the study team either with their own smartphone or one provided by the study team if they do not have their own to use
* Pregnant survivors are also eligible for this protocol, given that fertility and pregnancy are important AYA issues

Exclusion Criteria:

* Individuals under age 15 or over age 42
* Stage IV or metastatic breast cancer
* Males with breast cancer are not being recruited to this protocol. In the AYA age group, only a miniscule proportion of breast cancers occur in males. For this reason, the YES portal intervention materials have been targeted for young women