Is Non-cosmetic Botox (For Migraines) Safe During Breastfeeding?

Thank you for your question.  You may of had botox injected into one of the right DAO muscle causing your upper lip to elevate causing asymmetry.   Rest assured, the botox will wear off in the next month.  

Properly placed Botox Cosmetic can help lift corners of the mouth and soften marionette lines and even smooth the jawline. The effects are even more beautiful and very natural when combined with fillers. The combination also has a synergistic effect and can last longer than either treatment...

Having an allergy to antibiotics should not have any effect on your Botox treatment. In general, it is best to disclose any medications you are taking to your physician prior to having treatments. I hope this helps, and I wish you the best of luck.