Hi. You may need to use medicines with caution as the medicines are secreted in breast milk.. Take antibiotics if only absolutely necessary under the guidance of a physician

Ideally, medications are avoided during pregnancy and breastfeeding Still for managing illness as you mentioned we do prescribe medications depending on severity and impairment You can take PCM, levicetrizine  but must consult your gynaecologist for using antibiotic it's duration dose Alon with it you can take steam , drink Luke water

It comes under category B for use in pregnancy and should be taken only under medical supervision

No for cold ans cough while pregnancy unless the doctor and gynaecologist suggest in sync It’s an antibiotic There are milder medicines for flu allergy