Sis, kailangan mo talaga mag-consult sa OB mo about this one, yan talaga ang safest way para ma-confirm kung okay lang for your pregnancy, lalo na at 20 weeks ka na. Hindi ako pwedeng mag-confirm ng meds, pero please don't take anything without asking your doctor first, okay? Once you check, they can suggest what's really safe for your cough and runny nose. Praying the symptoms settle soon!