Bump on breast

Hi everyone. It’s been a week since I’ve had this bump on my breast. Its located on towards the bottom on my breast towards the middle.

It’s small and hard filled with pus when I try to pop it. I’ve popped it twice but it’s still here. Every time I pop it, pus oozes out. It hasn’t gone away. I’m extremely terrified that it might be cancer. Please give me your opinion and help!!