I have a hard pea sized lump between my breasts.2 weeks ago pus and blood cum out of it.but its stil here, the same size.could it be cancerous?

Inclusion cyst: You are describing a inclusion cyst not likely. Cancerous but removal is appropriate.

Chest Lesion: Bloody, pustular lesions on the chest wall in the midline rarely indicate breast cancer, notwithstanding your age and risk history, which you did not share. You might have a msra abscess, which can linger for weeks, but if it persists, a visit to your dermatologist would be warranted.

See a MD: It is not likely to be cancer but have a md evaluate the area to be certain.