Dry Cough

Hi mummies, I’m having dry cough which leads to lack of sleep at night. I only manage to sleep 2-3hours max cause i couldnt stop coughing. I tried drinking honey lemon water constantly but it doesnt really help at night. I went to the GP last week, the doctor gave me a cough suppressant meds & it doesnt work too. what should I do :( i’m trying to stay sane due to lack of sleep. please help. Thank you