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