A week ago today i was diagnosed with mastitis. I've taken doxycicline since then and have two days left. I don't feel any different. I' still ache all over especially my knees and writsts, my fingers are numb, I'm running low grade fever, very tired. I'm still trying to dry up my breasts. I've also developed a chest cold or sinus infection or something like that. I feel awful. My baby is two weeks old and i feel i cant take good care of him. i don't thing the antibiotics are helping. Could it be MRSA? Any thoughts.