Aiyooh, normal je sayang, kena selsema memang common during pregnancy sebab immune system kita agak down. A few of us mums went through the same thing, one friend batuk sampai 3 minggu, memang sakit! The coughing itself won't harm baby, tapi kalau dah week 21 pastu takde signs of improvement atau demam, better check with your doctor just to be safe and get something yang boleh help lessen the cough. Minum air banyak-banyak, rest, and use a humidifier kalau boleh, membantu jugak!