Cold chills, body ache, and sore throat... what over-the-counter medicine can ii take if im breastfeeding?

Herbal medcines: Sounds like a viral infection. You could take tylenol (acetaminophen) which may relieve some symptoms but may prolong the infection (by suppressing fever and thus immune response) but i would advise taking umcka, an herbal medicine proven to help with viral respiratory infections: http://data.Schwabenorthamerica.Com/common/artifactdocument/iti-pelargonium-sidoides-extract.Pdf. High doses of vit c may help too.

Tylenol (acetaminophen): Tylenol (acetaminophen) is safe for breastfeeding mothers, but you might want to see you doctor to rule out strep throat.