I have lumps in the breast and my breast, shoulder and back hurt. the pain seemed to come on suddenly. is this cancer?

Get an ultrasound: These could be hormonal changes or caused by caffeine intake. At 22, an ultrasound is the best way to image the breasts.

Highly Unlikely: Many breast lumps found on (self) examination are simply "lumpy-bumpy" breast tissue. If a dominant mass is present, it could be a cyst, a benign tumor, or a cancer. The best way to differentiate these is to see a breast surgeon. However, at age 22, the chance of breast cancer is about 1 in a million.

Probably not: Breast cancer in a 20 year old would be exceedingly rare. You discuss your concerns with your friendly primary care physician.