For a 2-month-old child weighing 11lb, the recommended dose of Tylenol to administer in case of fever is 75 mg per dose, with a maximum of 5 doses per day. It is important to know the concentration of the acetaminophen solution you have at home to calculate the correct dosage. In addition, for wrist pain, you can apply anti-inflammatory gel or Voltaren Emulgel™ in small amounts for a few days. Also, consider adjusting your positioning during breastfeeding, as it may be contributing to the pain.