I have found sore redness at the bottom of my left breast. I have been to GP who thinks it is a breast infection. He examined my breasts and could find no lumps or other abnormalities. He had given me an antibiotic co-amoxicolv. I had been on another antibiotic fluoxcillian which I only finished last week due to a dog bite but doctor was aware of this. I am scared if this infection does not clear and if it turns out to be something more.