3+ Staphylococcus aureus Isolate is MRSA

Girlfriends brother has diabetes & has had mrsa few times, his mother has had it. His sister died from sepsis. Didn’t know that mrsa stays in the body! I would’ve treated such as healthy people do. Hand swelled up and received 2 or 3 bags IV antibiotics overnight my elbows have been aching, hurting so bad @ 46 sometimes holding a gallon of water was overwhelming. Any suggestions? Mayo is the best & I feel what little I’ve read could knock this shite out. Thanks for any advice. Little mad that “girlfriend” knew more & played it off to common cold & when said well that stuff is probably around your moms house & like oh yeah I love you too baby!! FkN Fk. Frustration. Anger. Afraid.