How long after antibiotics

Hannah🇬🇧

I have mastitis and it’s made me very poorly to the point I was in hospital yesterday for a very high fever. Iv got 7 days of antibiotics to take and I’m on day 2. How long will it take for the hard lump to go down in my breast? I’m still nursing and expressing of both breast. But the redness and the hardness doesn’t seem to be getting any better