I Have Several Episode Of Cough With Yellowish Sputum. This

i have several episode of cough with yellowish sputum. this time around, comes with shortness of breath and ronchi sound and doctor need to give me salbutamol nebulizer. discharged with prednisolone, bromhexine and salbutamol. but, i can feel increased palpitations and cough still there. what happen to me? by the way, im 30 years old mom of 3 kids. working in clinical environment.