Aiyo mak, this sounds quite uncomfortable and happening right after your vaccination, do check with your doctor or midwife asap, sebab the combo of severe pain, the discharge colour change, fever, and shortness of breath kena make sure kat healthcare provider, just to rule out mastitis or something else yang needs attention. A few of my mum friends kena similar during pregnancy and turned out minor, but the breathlessness part tu yang i'm concerned about, that's not typical breast soreness. While you wait untuk appointment, warm compress mmg boleh tolong sedikit (air suam okay, or try Mama's Choice Nipple Cream to help with the tenderness around areola area, it's safe in pregnancy), but honestly i think this one kena get checked quickly rather than try home remedies. Jangan tunggu, text midwife or call clinic, better safe, kan?