Hello sir .my sister age 27 newly married she is 5 th month pregnancy carrying . Since 2 months dry cough she was having night time more cough she having kindly advice any reasons. Even if cough increase sometime vomiting also coming don't know No chest congestion only dry cough may i know what blood tests or xray needed to findout pls advice And may i know we ar worrying can dry cough will be a symptom of TB or cancer as well pls tell . She don't have any health problems except this since 2 months Clarity pls Thanks