i'm also suffering from similar situation. but now the situation is improving. i start every time from the side producing less. if not enough, switch to the full side. and do not empty the full side. always leave some milk to tell the brain not to produce so much. originally, one side produces 1oz while the other produces 4oz. now, 3oz vs 5oz.
oops. wish you get well soon. lah. yeah. if it is due to engorgement, you need to empty the breast and the fever will go away quickly. i was also very sick during the first month after delivery. don't worry. i'm fine now.