Anacin- Contains Asprin , which is not an ideal pain killer , as it can cause some side effects rarely like Brusing, Gastritis or Bleeding in some patients . Being lactaing mother , I would suggest to go for other milder Analgesics.
Next Steps
Consult your doctor for analgesics, as its essential to ruleout other cause of headaches and to know if you have any drug allergies.
Health Tips
Get good night sleep and take steam inhalation if its not contraindicated for you, Consult with your doctor if headache aggravates or if any other symptoms arises.