Girls, please tell me about your experience with mastitis and breast p…

Girls, please tell me about your experience with mastitis and breast pain. Since yesterday my breasts feel like they've been swapped ? First one, then the second, they hurt terribly even at rest, hot. There are no lumps, there is slight redness on one side (it hurts more) and when I hold the baby for the first 5 seconds sparks fly from my eyes ? There's no relief after feeding or pumping. I applied a cool compress, but unsuccessfully. Never before in 3 and a half months have my breasts felt this bad, what happened?! Help with advice ??