Aww, nakakaalala ko yung ganyan with my first baby, ang daming worries! Siguro best to bring her to the doctor para ma-check properly dahil ang frequent coughing combined with sipon ay gusto mong i-rule out kung may upper respiratory infection or something else going on. Hindi masama ang coughing mismo sa babies, pero pag ganyan ka-frequent at may sipon na rin, better safe than sorry lang talaga, especially at 5 months pa lang siya at napakababy pa.