should i bring baby to see doctor?

my son is 3 months 19 days to be exact, he has been having fever fr 2 days. coughing and sometimes cough during his sleep for th past days. but during day n night he is still active, smiling and such buuuut he shout quite alot past days idk if its just bc he is playing with us hahaha anyway that aside, i checked his temp recently was 37.8 so i gave paracetamol that dr described during his 1st injection. shld i still bring him to see a doctor? idk what to do with his cough :( #firsttimemom