Hello, Welcome to healthcare magic.
You have negelected your health. You should have gone to you family physician or obstetrician in the 1st month itself after you felt those symptoms. According to your symptoms, it is breast abscess
that has been formed. This is fairly common during lactation
. If you go to a general physician, it can be treated with antibiotics or a small surgery called incision and drainage
where a small cut is made to drain the pus present in the abscess. You can also go to a homoeopathic consultant, where this condition can be treated with homoeopathic medicines. The pus will be either absorbed or an opening will occur from where the pus will be discharged and healing will take place under homoeopathic medicines. This condition is curable. It would not lead to cancer. But you should not neglect this condition. You should ask your doctor the right way of breast feeding, so that breast abscess does not recur. Wish you and your baby good health. Take Care