Back side lower ribs pain when breathing

Hi doctor Im 14 years old and i have phlegm problem since i was 2 years old. My parents tried to treat it but it was not ok the phlegm cough came again The doctor diagnosed it as asthma. I often experience fever as my doctor tell it infection  and whenever i experience this infection i take Augmentin ds and i become perfectly all right The fever is not high it is around 100 to 101. I had pneumonia once when  i was 10 years old I have allergy to dust smoke pollen and pets I use nasal spray but not any inhaler or asthma treatment. Because it is better  now. I just have like a kind of allergy asthma whenever i am exposed to these thinfs my nose is blocked and i use nasal spray and i become ok I cough and phlegm is greenish yellow type Last year i had influenza vaccine  in november I m scared that i dont want infection to come again I have cough whole 24 hours and when i drinkn hot things like tea milk soup i feel better please help me doctor i dont want infection again joshanda is helpful