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There are a couple of problems that you could be looking at. The first is that she might have an infection from any fight wounds. This can quickly get serious.
The second is that she might have mastitis. This is pretty common when a mom is nursing. This requires antibiotics to get some relief. Dogs can die from mastitis if it is left untreated.
I suggest that you see the vet with her right away.
Let me know if you have more questions.
I am not a vet so cannot tell you dosages of antibiotics.
Even if you are in the medical profession, it's never a good idea to try to treat your pet at home.
Some antibiotics work for some causes and some don't.
Your vet would be the best one to guide you on this.