Tia, normal yan sa first few weeks postpartum, ang body mo ay dumaan sa major surgery at hormones are all over the place, kaya ang headaches at chills ay common talaga, lalo na if hindi ka maayos na natutulog or kumakain ng enough nutrients. A few of us moms in my circle experienced the same after CS, one friend namin swore it lasted about 3 weeks para sa kanya, pero important talaga na i-mention mo ito sa OB mo next checkup para i-rule out kung may fever or infection, better safe na lang, especially postop, kaya quick call sa doctor mo would be smart, ha?