Linda, Sounds like this mom is just experiencing the roller coaster effect of a returning menstrual cycle that will possibly be irregular for many months (years) to come. The antibiotics is probably a non-contributing factor. Lansinoh would probably not help. Mother needs to stay hydrated & probably space feedings out during the tenderness days. As soreness dissapates (within two-four days), toddler will increase feedings to get milk supply back up. Also, a grin & bear it approach also is needed though not fun. Personal experience with this! Lora Gleaton